Does he hate me now?

So me and this guy were quite close. It came to a messy end due to an incident with some false rumors and a mutual friend. Then he got together with some girl and he changed. Like he'd get really uncomfortable and leave if we were alone for longer than a minute (yet initially he'd look like he was pleased to see me.) He'd be harsh to me a lot of the time when I passed him and his friends but id catch him looking from afar at other times. He stopped talking to me so much except for when I was with guys then he'd do anything to get my attention and like if I happened to be waiting outside his classroom waiting for my lesson which came after his and he saw me he'd always come out with some girl and being all flirty and would then look over at me whist with her. Even now he's not with that girl he's like that... Why is he like that? We used to be friends... so is it as simple as he hates me or did he have feelings for me that were more than friendship? why is he acting like this? guys would you go to this much effort to be awkward with a girl if you purely hated her? Please help.
Does he hate me now?
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