What happened to us?

No judgement please 😊😊

So me and this guy at my college starting talking. We hit it off REAL quick and have so much in common and we’ve been making each other laugh like crazy. We’ll both be graduating next month and he’ll be moving out of state. Because of this we agreed we’ll just be friends and occasionally hookup if it gets to that point because we’re attracted to each other. This is fine with me because I’m not really looking for anything serious right now. Well last night our conversation got deeper than usual and he talked about personal things. Then this morning he doesn’t text me at all, leaves me on read, and his whole vibe was off. Even when he did text me it just didn’t sound like him. I have no idea what happened but I’m so bummed about it 😔 he’s genuinely someone I enjoyed talking to and I miss texting 24/7 when we weren’t together. idk if something happened or if it was just a bad day. I’m scared to ask him anything about it. It just sucks!