you and derek were friends in college and you had a huge crush on him. You reunite when he is working a case that you're involved in. Over time, you're feelings come back 

Y/F/M=your favorite musical 

Y/BF/N= your best friends name

"5,6,7,8!" You hear the music begin and smile. You couldn't believe you found time in your schedule to be in (Y/F/M) but you were glad for it. You had even managed to snag the lead. Today you were working on the big dance number and it was definitely wearing you out.

The song ended and you stood there for a second, breathing heavily. "Good job everyone, take a break." The choreographer said and you grabbed your water bottle. The door to the studio opens and several people come through. They looked like detectives. You shrug and turn away.

"Hey, Y/N, think they're here about Lucy?" (random name) You look up and see (Y/BF/N) standing there. You sigh and nod. "She's been missing for what, three days now? If they're here, that's not a good sign." 

"Hey, (Y/N), come over here." You head toward them and stop in your tracks. "Derek... you whisper. He looks at you, confused for a moment. You see the realization dawn on his face. "(Y/N)"

You grin and wrap your arms around him. "Oh my god Derek, ive missed you." You step back and see that he has a huge smile on his face. "Ive missed you too." He turns to his team. "Hey guys, this is (Y/N) (Y/L/N) we've been best friends since we were kids." You nod. "Well, since y'all are here im gonna assume it has something to do with Lucy." He nodded. 

DEREKS  POV

"We're looking for the director." Rossi says and the man in front of us nods. "Thats me. You're here about Lucy?" I nod and he winces. "She's always been very punctual. When she didn't show up for three days, we all kinda knew something bad had happened." "Who was she playing?" "She was ensemble, and understudy to (Y/N). They were really close." He turns and waves to a small group. "Hey, (Y/N), come over here." 

She turns around and I freeze. I knew that face. Ill always know that face. I grin as she stops in her tracks. 

TIME SKIP

YOUR POV

They brought you to the station for questioning. Even though deep down you knew something bad had happened to Lucy, you had kinda hoped she was still alive. Derek sits down beside you.

"Are you okay?" You nod slowly. "She was a good person. Sometimes the understudy and the lead don't have the best relationship but she... she was too good for petty drama."

He nods. "You know, if i had known you were here... I would have come to see you." You nod with a small chuckle. 

"I know. I could say the same thing about you. I guess thats just what happens with time." The two of you sit in silence for a moment before he gets up. "I have to go. Be careful, okay?" You nod and he walks away. 

As he walks away you feel a slight pang in your chest.

FLASHBACK

It was graduation. You and Derek were at your mom and stepdads place for an aftergrad party. In the morning you were headed off to (Y/F/U) and Derek was staying in Chicago. You looked down at the letter in your hand. 

"Just give it to him, tell him how you feel." You thought to yourself. He sits down beside you and you slip it under your diploma. 

"Hey." You say. "They're wrapping up out there, you gonna come out?" You shake your head. "I am glad to be leaving. There's too many bad memories." He nods slowly. "Plenty of good ones too, I hope" 

He puts his arm around you and you feel your heart flutter. "You'll always be my best friend, (Y/N)" You feel your heart sink. All you do is nod, crumpling up the note and putting it in your pocket. 

He gets up and gestured for you to follow him. You watch him walk out of the room, and you feel a single tear slip down your cheek

FLASHBACK OVER

You rifle through your closet, looking for the garment bag that you hadn't ever opened since you put the robe in their. You unzip it slowly, reaching into the pockets. 

Your heart stops when you feel the crumpled paper. Gingerly, you pull it out and take it to the kitchen table, gently flattening it out so you can read the words you wrote to him over two decades ago.

Dear Derek, 

I have no clue why i am writing this. Maybe its cause i actually believe that there is a small possibility that you may ever feel the same way about me that i feel about you. Im in love with you. Have been since... probably since we were 10 years old and you saved me from getting pushed around on the playground at school. You've always been my protector, my best friend and right hand man. But... Im leaving. And i honestly don't know if I will come back. So... If i work up the courage to give you this, just know that i love you, And probably always will. 

(Y/N)

You chuckle. You hear the doorbell ring and you jump. You forgot you had invited him over for dinner. You open the door and he is standing there. 

You give him a big hug show him inside. He gives a low whistle. 

"Damn, (Y/N) you have a nice apartment." You laugh and sit on the couch. "Thanks, I kinda totally forgot that you were coming, so does pizza sound good?" He chuckles. "Yeah, go ahead." You place the order, not really paying attention to what he was doing. 

"Make yourself at home, there might be a six pack in the fridge if you want some." You call. He doesnt reply so you look around and hes standing against the table, with that fated letter in his hands. You feel the blood drain from your face.

"When did you write this?" He says quietly, looking up at you. You stand up and lean against the couch, not quite meeting his gaze. "Three days before we graduated college. I almost gave it to you but... I was reminded of it when i saw you. Its been in the pocket of my robes this whole time."

You hear him move and see his feet, standing in front of you. 

"Did you... did you mean it?" You nod, finally looking him in the eyes. "Derek... I meant it when i wrote it and i... i still mean it." 

He smiles and moves even closer to you. "Why'd you never give it to me?" You sigh and finally move around him, standing in front of the fridge. "I didn't think that there was a possibility that you could ever return my feelings. I was too afraid of losing you as a friend."

You feel his hand on your shoulder and he turns you around to face him. "After a while, I tried to forget about you." He whispers. "But i couldn't. I guess you really do never forget your first love." 

He leans in and kisses you, wrapping his arms around your waist. You kiss him back, pulling him against you. The doorbell makes you both jump. You look at him and smile.

"I guess i should have given it to you a long time ago." He chuckles. "Lets get that pizza."