Does he hate me now, or is he just confused and angry?

He's my best friend - even though we met just last year, it feels like we both knew each other for a long time. He said he likes me a few months ago (no idea what he feels now - probably not especially after yesterday) and he's always been here for me, always supporting me. Now that I reflect on it I haven't done much for him yet he's moved mountains for me. Everything was going great, and these few weeks I started to develop feelings for him. I haven't seen him for around a month now, and yesterday was the first time I saw him since the trip. He acted different, cooler and more reserved. As if he didn't want to see me anymore, repeatedly wishing me good luck and that he'll see me next year. I had confirmation I was leaving the country soon in a month yesterday and I told him, but he's staying. Him saying that made me really hurt in the sense that he wasn't even willing to see me for the remaining days and also felt like he didn't give a sh*t about me anymore as I could infer. So I told him his coldness made me a bit awkward and uncomfortable, that's when he started looking mad and I could tell I angered him. I just told him how I felt about the date and he reacted really badly. I apologized but he still isn't treating me the same and now ignoring/brushing off my msgs. We fight sometimes, each time he gets mad easily but he also lets go easily (say an hour or so). Comparatively speaking, it's been a long time now. I'm sad, frustrated but I don't know what to do.