Shouta Aizawa

He was the first to say it, but you didn't say it back right away. It happened early in the morning, he knocked on your door while you were still sleeping. You groaned and got up, messy hair and in your pajamas. You opened your door and groggily asked "What?"  As soon as he saw you in your sleepy state, he fell in love.

"I love you."

"What?"

"What?"

Nemuri Kayama

She was for sure the first to tell you. She helping you out with some work. You two were joking around and laughing. Once she finally calmed down from joking around with you she muttered 'Ah... I love you.'

 Tsuyu Asui

You two were going on a date when she awkwardly held your hand and said: "I love you, (Y/N)-chan." She was really shy about saying it and you could tell she was nervous. You replied with the same words and squeezed her hand to comfort her. She was much more affectionate after that.

 Uraraka Ochako

You said it first actually. You were planning to tell her since you both started dating and you decided you wanted to make it really special. You took her to a very fancy and expensive restaurant. She was in complete awe from the beauty of it all. Once you two had your meal and were chatting about life, you placed your hand on her's.

"Ochako... I wanted to tell you, I- I really love you. I hope you know that."

She cried.

 Denki Kaminari

Do you really think he would say it first? No way. Sure, he was bursting to tell you, but he didn't have the guts to do it. You two were just laying in bed together and saying stupid stuff to one another when you turned your head to face him and mutter;

"I love you."

He cursed himself for not telling you that he loved you first.

 Eijiro Kirishima 

Much like Denki, Eijiro wanted to tell you, but he just felt he might have been rushing things. The two of you were cuddling one night and just spacing out in each other's arms when he made a corny joke.

"What is a fake noodle called?" He cracked a grin.

"What?" You couldn't help but grin too.

"An impasta!"

You laughed at his joke. "Oh gosh, I love you." You muttered in a sigh. He stayed silent for a moment in shock.

"Damn that's so unmanly of me! You said it first!" He clenched his fist.

Shoto Todoroki

It wasn't really a romantic 'I love you' it was more upsetting. You and Shoto went out on a date to a nice restaurant and he paid for it. You two were holding hands and walking out of the restaurant when you began to say your goodbyes.

"I'll see you at s-" He cut you off.

"Could I please- stay with you tonight? I know it's rude of me to ask but..."

You cocked a brow but agreed. "Sure." You nodded. "We can sleep together." You worriedly squeezed his hand. He returned the gesture.

Once you two got home and out of your formal attire, Shoto asked for a hug. You sat down and fell into his arms. He hugged you securely.

"What's wrong Shoto?" You questioned in a whisper.

"My father..."

Of course this had to do with that old man. Shoto's grip around you tightened as his sadness started to show.

"Hey, hey. It's alright... I love you, you can tell me anything."

Those were the exact words he needed to hear.

 Katsuki Bakugou

No one has actually said it yet. You tried to, but he didn't let you. 

One night, Bakugou was staying with you in your dorm to help you do some studying. You were really grateful for his help and verbalized your thanks a number of times.

"Thank you so much Katsuki, I didn't really understand Trigonometry but thanks to you- I get it now!" You looked down at your practice sheet with glee. The tall boy only 'tch'ed you. There was a moment of silence between you two until you decided to break it. "You know Katsuki, I lov-" He placed his hand over your mouth quickly.

"Don't." He moved his hand away.

You frowned. "Why can't I say it?"

"Because! I need to say it first! Idiot..." He looked away and grumbled.

Izuku Midorya

Surprisingly, you both said it at the same time. It was after your first 'romantic hug' that almost became a kiss. After school, Midorya was walking you home. The two of you were just talking and laughing to one another when you arrived home. The green-haired boy looked a little sad that he didn't get to have any contact with you before you went inside. You noticed this and opened your arms up for a hug. He gladly held you in the hug and after a moment you broke apart.

"See you tomorrow Izuku." You waved goodbye.

"Yeah! S-See you..." He clenched his fists. 'I have to tell her now!'

'I think this would be a nice time to say it.' You thought to yourself.

"I love you." You both said in sync.

"Eh?" You two blinked at each other in confusion.

"W-Well uh- see you tomorrow!" You two- again- said at the same time.

After you got inside your house you started to get extremely flustered and giggle to yourself, little did you know- Izuku was doing the same thing outside.

Momo Yaoyorozu

You and the rich girl were sitting together at her house. Her parents were out on a business trip so you two were home alone. You got her a small gift, it was a necklace with a tiny diamond heart. 

"I love it! I love you!" She exclaimed and brought you into a hug.

 Hitoshi Shinso

Long story short, you dressed up as cats for Halloween without telling each other and he blurted it out. You two met up to go trick or treating when you saw each other in the same cat costume.

"Oh my gosh! We're matching!" You grinned.

"I love you."

"What?"

"What?"

 Mirio Togata

You both were training together and you weren't doing so good against his quirk. After being flashed by him multiple times while getting hit in the face with his punches, you eventually fell to the floor with a thud.

"Hey! You okay there?" He slid down to your side to help you up.

"Y-Yeah! I'm fine! I just need to work a little harder!" You smiled brightly up at him.

"Hahaha! I love you! Now come on, let's keep going then."

In the middle of the training session, your face turned bright at realizing that he just said 'I love you'

 Nejire Hado

She began complimenting you on your quirk, how cool you were, your personality ect- then she randomly said I love you.

"I love your quirk! I love how you act so cool, I love how pretty you are! I love all of you!"

Tamaki Amajiki

He said it first, but it took a lot of time. 

"I need to say s-something to y-you..." He avoided eye contact.

"Hm? Yeah, Tamaki?" 

"I-I-I, I uhh.." He stuttered a lot for the next five minutes, and you eventually figured out what he was trying to say and stopped his frantic stuttering.

"Do you want me to say it first?" You asked, smiling sadly at him.

"N-No. I w-want to say it first."

"Okay then, take you time."

 Camie Utsushimi

You guys were texting one another and sending memes. You had spammed her with a bunch of videos and she likes all of them. She sent you a message saying 'I love you???? Marry me????'

 Mt lady

You had to say it first, she was too flustered. You were getting beaten in a fight with a villain, and your bae came to the rescue. She helped you up and held you close.

"Idiot, you almost died." She mumbled while taking you off the battlefield while the other heros dealt with the villain.

She set you down in an ambulance and sat next to you. "Thanks love..." You held your sore arm.

"Eh?! What did you call me??"

 Endeavor

He would never say it. Ever.

Dabi

He kept calling you love ever since you two met. He wouldn't stop no matter how many times you asked, but you got used to it eventually.

 Himiko Toga

The moment you two met and finished having a conversation, she told you she loved you and she wanted to taste you. It freaked you the hell out.

Tomura Shigaraki

You two were sitting in bed and talking, he was talking about the things he had hurt using his quirk while looking at his hand. You took his hand and kissed the palm, you told him you loved him at loved his quirk. He even smiled.