fell in love with someone i barely know, not really attracted to anyone else?

hi,I'm in a predicament. 2 years ago I met someone in my first class in college and I really liked them. ( I am a gay boy) I have very very rarely talked to them since that semester ended. I will be a junior this fall and I yet this person still occupies my mind every waking hour of the day. i look at their socail media every day. it does not help that this person seems drops me hints they like me too on the occasion I see them. (not sure if theyre straight)Right after I first met this person my self esteem went to the lowest levels ever; i considered suicide at points especially when i saw this guy (im fine now). I did everything in the world to improve my appearance and downloaded tinder to have some fun and now I am convinced I am very handsome and sexy. But nobody I meet or see is anything compared to this one guy i met in a class 2 years ago. Ive hooked up with guys that would be more 'conventionally attractive' but after the novelty wears off I could care less.Has anyone else dealt with something like this, falling in love with someone you barely know and it just refuses to die out? This person goes to my school, so I imagine there is 2 more years of this garbage if not more. Nobody i meet does anything for me but my heart is bumping out of my chest whenever i but see this guy. I want it to end.