I don't know what to do...

Hey Guys...So I am a bit torn right now. Let me tell you about myself first...I have never posted in a thread before so I apologize in advance cause I don't know how to keep the flow. So anyway, I am 21, bi, from Pakistan. 3 years ago when I was got admitted in college..It was my first day. There was a guy there. He was new too. I am kinda bit shy so I never got a chance to introduce myself to him but it was the moment I felt something for him. Following day, I decided I will try to get to know him and talk to him but he never came...days pass by and he never showed. Months passed by... I decided to go to my teacher's house for tuition (extra study) cause the course was bit difficult. So when I got there, day 1, there he was... I didn't noticed at first but when I saw him I was like *internally screaming*. So we talked we study... we took part in dance competition together... In short we became best friends, more like inseperable.
A year passed by... we were going strong but I had a stupid idea, the moment that ruined everything altogether... I told him that I was a bi and had a crush on him but he don't have to worry cause I am so over him cause we were friends now. He was like 'its cool. I don't have any problem with that but just so you know I am straight' and I was like 'Oh I know don't worry bout it'. Days after that he tried to show he doesn't care about my sexuality or anything but It was so clear that he was afraid of me now. So one day we were just talking and he suddenly said "I am afraid I am gonna become gay like you".
Half year later we were accepted into a university. He found new friends and slowly slowly we started to fall apart. He started acting aloof around me. Started making fun of me whenever he was with his other friends. His friends started to conspire against me to him. Started telling him that he should stay away from me, that I am still in love with him.
One day I decided to face him. I asked him that he had to stop hanging out with those people who insults me everyday and he replied No it's you who is the problem and act like a girl all the time. He stopped talking to me. Before him I had lost a best friend to cancer so he never understood how much friendship meant to me. Anyway a year passed by... he never called, never asked whether I was alive or not and then one day out of nowhere he called me. I was surprised and yeah i attended his call and he asked me how I was and what GPA I got etc etc.
We started meeting again gradually but he still had that taunting tone whenever he talked about me. He was never alone, was always with those people who wrote in the classroom that I was a faggot. For him I didn't complained. I accepted them too. So a month back he texted me to tell me that he is engaged and I went to his engagement party and made him a sketch of him and his fiance. Next day he called me to his office. When I got there he was alone (I was surprised). I found this opportunity useful and asked him why he treated me like that when we had that fight. You know what he said "Which fight? I was never mad at you. It was just..I was really frustrated cause of myself and my usual circumstances and you know me well how I am, I get angry cause of no reason. It was just bit of misunderstanding nothing else and my friends never meant to hurt you". The last part...he was still defending them. But i said ok alright. I really wanted to ask him that was je really angry for a whole year? Was he that ignorant that I literally begged him to stop treating me like shit and he just didn't cared? Was he that cold hearted that even though It wasn't my fault I still apologized to him and his friends even though one of them threaten to kill me? But I didn't cause i knew he wouldn't reply to that.
Few weeks before I went to his home for a sleepover. It was most fun night I ever had cause I.. have a really messed up and complicated family history so whenever I am out of my home and with him i am happy. But that was the last time I talked to him....
Now the problem is... I don't know where it is going... I don't know how I am gonna process all this again... he reels me back and then cut and reels me back and cut the string again n again and I can't let him go I don't know why... So if any of you kind enough to tell me how to deal with him and myself please do tell me... And I am really sorry it has become a john green novel's length story. I'll be waiting for your replies. Thanks.