Has he become uninterested?

So this guy I had been talking with asked me out. He kept wondering if I was free this weekend, but I said no because of work and the holiday, but told him I was free this Thursday. He told me he’ll let me know if he can and it’s been a few hours since then. I feel like he has suddenly become uninterested, or am I just overthinking things? I mean, it seemed like he really wanted to and now all of the sudden there’s just nothing. I’m just getting a bit tired of guys flaking on me for no reason.