my Straight Friend?

I'm bisexual, my best friend is seemingly straight. When I first met him I don't think I had any attraction for him, I really have always just seen him as a friend. I met him first year of university and pretty instantly became best friends. I'm usually pretty shy and he always made me feel comfortable we did absolutely everything together, he lived across the campus so we would always sleep in each others beds and had a sleep over every night at whichever room we ended up. We were known around our halls for being the 2 drunk kids that were always together. He started doing all this really odd stuff that over time just felt natural and I let it happen - would wrap himself around me when we slept, started calling me babe all the time "as a joke" then he started this game where he would grab my dick all the time under my pants and slap my ass all the time. I ended up doing all of these things back and this is when feelings for him started growing. I've only been with girls before but I've never felt feelings for anyone like I have with him he has all my same interests and I cant stand being a second without him. It's now our second year and were now roommates in an apartment. We still slept in the same bed even though his room is right by mine, we experimented kind of, he kept saying i bet my dick is bigger than yours... so we measured, but we needed to be hard so he started jacking me off, and i did the same for him. It felt really weird but really right also. We always joke about how were never speaking of that again. He walks out of the shower naked in front of me naked every day, no shame and when were out his arm is always around me. All our friends joke around saying were gay but none of them really think it. He got a girlfriend recently and has completely distanced himself from me, he stopped calling me babe, stopped wanting to sleep in the same room, lets me go out and drink without him sometimes(something he'd NEVER do before, he'd always have to be with me). He just seems like a completely different person, it makes me really jealous of his girlfriend. He started everything we did together, he doesn't know i'm bi, but i've always figured he was bi... but maybe thats just his personality? but if it was just his personality why the drastic change?I feel terrible over this and have been drinking myself to sleep the last few days. I told him we should split up our clothes and not be so close anymore because he doesn't like me as much as I like him anymore.. he started crying and saying that means I don't want to be his friend anymore. He's pretty impossible to read. He's said things before like "you'd still be my friend if you were gay, but i would feel really weird treating you like this".I don't know what to do. right now I just wanna split our things and distance myself from him. Try to find a girl or something to get over this......Sorry for long rant I just dunno where say this and its kind of making me crazy.