What did I do??

That is a rhetorical obviously but I just need advice or someone to talk to about this. I was talking to this guy for a few months (March to be exact) and things were going so well but then it just... stopped. He started posting about how he was never flirting, he’s just smooth like that and that he wants a girlfriend but there’s no one that’s girlfriend material. I tried messaging him and he just liked my message and that was it. I don’t know what I did. I don’t know what to do. Do I just not reach out anymore?

(If you saw my post about pic you would know what it said. I reached out after I posted that)