What is he thinking?

So we had a fantastic first date, ended with a few deep kisses. He paid, drove me home, all that. He then texted me next day, and we chatted for a bit. Then we didn't talk for a few days but that is normal for him, and I didn't want to overwhelm so I left it alone. Then I texted him today just being like how was your weekend?

Now 12 hours later, no response. Did he lose interest that quickly?
What is he thinking?
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