Why would a guy stop talking to you after sex?

I met a guy we seemed to hit it off. We talked from morning till night. He said he wanted to know everything about me. Then we had sex and he only texted a couple times. I thought we had a good time but he doesn't seem interested. Maybe it wasn't good for him. Why would he stop talking? Maybe busy with life? I know he has other stressers in his life could that be it amd i am over reacting?
Why would a guy stop talking to you after sex?
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