still living with ex, HELP

so basically, i broke up with my bf of almost 2 years a few weeks ago and we still have to live together. we’re in college so housing is hard to find. after the breakup we were both obviously sad about it. we facetimed twice since it happened. the first time was super emotional for both of us. he was holding onto hope for us. i knew i couldn’t go back tho. but i agreed that we’d still talk once a week. second time we talked, i was kinda over it and didn’t want to talk. but he was still obviously very hurt. i put boundaries in place that he was obviously upset about. i tried to not show i was upset. he texted me later that week apologizing for everything he did and telling me how amazing i am.

so the second i move into the apartment a few days later, he’s so cold to me. only says hi and that’s the most he’s said in 4 days. he seems angry with me, even tho a week ago he was supportive of me and he always said he could never hate me. idk what changed. yeah he’s prolly mad about the breakup, but this feels like it’s more than that. i never did anything to compromise our relationship when we were together. i always tried to have a level head. idk what i did. please help me.