A/N: I thought it would be nice to include the girls in this preference, and here they are! They're kinda crappy :( but I hope you enjoy! Also Happy October 1st! 

Clary: It was when you lost your temper. It was normal for you to get angry and share your opinion but this time you let loose and stood up for her. The ways of being a Shadowhunter were difficult and hard for her to learn, you fought with Hodge and told him to be more careful with her or you would train her yourself. Clary had only thought you were a friend before, but the way you held your ground and the anger you felt to seeing Hodge get too rough with her, made her realize how special you were and that she was definitely starting to get interested in you.

Isabelle: You two had grown up with each other and been friends until you were thirteen, then you had to leave. You were trained at the LA Institute by the Blackthorns, and you two had missed each other's most important years of your lives. With Valentine's daughter being at the old Institute, you were sent down to help. You and Izzy stared at each other and noticed all the new differences. She felt something for you that she couldn't understand, and then she knew she had to be in love. 

Lydia: After all that she had been through you were the only constant thing in her life. She felt terrified to the feelings she had towards you and how she didn't understand them. She got engaged and was to be married for her job, you weren't going to go to the wedding due to a broken heart, but then you realized how much this hurt you and how you needed to do something. You interrupted the wedding with all eyes on you and told her that you loved her. She ran down and kissed you and apologized to everyone, she couldn't  help the way she felt and seeing how you changed her future, she loved you even more.