Does he hate me?

I met a guy at uni on my course and we got on well and grew close really quickly and were always laughing and roasting each other and then had a deep convo about something and grew closer. After that if he saw me struggling because my backpack was heavy he'd offer to carry it and would go out of his way to to walk to me lectures or out of them. And would always notice if I was sad and do what he could to cheer me up and was always excited when he knew we were going to have class together. Then after one weekend I got to class and I tried to make our jokes it was like im a stranger and when he saw me he didn't say hi and then we just started having small talk. And now we don't speak at all anymore. And he's seen me sad a few times and has ignored that and me. What did I do? And I know he doesn't have a girlfriend.

You need to ask him what's changed or happened.

Hi I'm scared to ask what if it makes things awkward I have to see him often

I met a guy at uni on my course and we got on well and grew close really quickly and were always laughing and roasting each other and then had a deep convo about something and grew closer. After that if he saw me struggling because my backpack was heavy he'd offer to carry it and would go out of his way to to walk to me lectures or out of them. And would always notice if I was sad and do what he could to cheer me up and was always excited when he knew we were going to have class together. Then after one weekend I got to class and I tried to make our jokes it was like im a stranger and when he saw me he didn't say hi and then we just started having small talk. And now we don't speak at all anymore. And he's seen me sad a few times and has ignored that and me. What did I do? And I know he doesn't have a girlfriend.