Were we to quick?

So I took this girl out Saturday and we had a really good time. Well one thing led to another and we had sex in the back of my car on the first date. I really liked her. She initiated it after we while we were cuddling. Before hand she told me she broke up with her ex a week before we had met so that really put me off and I ended up not finishing. Now it seems like she’s stringing me on and bread crumbing me. I still like her but I don’t like to be played with. I’ve been really dry otp with her and I think I’m starting to lose interest. But part of me still wants to pursue her. Afterwards she asked me if we were together now and I panicked and told her we need to take things slowly and she told me it’s a bit too late for that now. I don’t know what I need to do. Should I try and stay in our little situationship until she cuts it off or should I make her mine?
Were we to quick?
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