Feelings ?

If you have feelings for someone that you had for a person for a long ass time sense middle school but didn’t know how to tell them but he has feelings for me still but turns out he’s in a relationship how do you control your feelings like I have deep feelings like I sometimes wish we would’ve got together but seem like I’ve dodge a bullet? I’m 20 and he’s 19 he would’ve been my first boyfriend and I’ve would’ve been his first girlfriend but i should’ve know it would’ve been too late because he already has someone. It’s hard to trying to not to think about him even though he has a girlfriend.

Comment below need some advice👇