After hooking up, what if a girl doesn't text me back?

Anonymous
I hooked up(made out) with this girl last weekend and I got her number. I texted her and she replied a couple of times, but when I said Last weekend was pretty fun, we should do it again I got no reply. Does this mean that she is now not interested even though her friend told me last weekend he was interested in me. What does this mean? P.S. No one was drunk, and we also cuddled for a while and talked for about 2 hrs before hooking up and has a lot in common.
After hooking up, what if a girl doesn't text me back?
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