Need post hook-up advice:I don't know what happened?

I kinda know what's going on but still some clarity would be nice. I was texting with this guy on and off for a month and initially I wasn't super interested. He was very proactive in texting me and would double text and want to make plans all the time. Then a few days back we hooked up kinda suddenly and when he left he asked me if he can see me again and I said yes. He said he would text me and like a dumbass I thought he means it. Anyhoo I text him a couple of days later because I kinda liked his company a lot more than I thought I would (also didn't want to play games) and while he responded and was engaging there was certainly a drop in the energy levels. It's been a week since then and he still hasn't texted on his own. I suppose I should cut my losses and move on but I don't know what happened. Any ideas?

Need post hook-up advice:I don't know what happened?
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