dude i dont see where the problem is?
It's a fantasie... you have no problems with her, no boring talks etc... Just funny flirts and sex.
Next time when you do her, you can ask her after the sex why she doesnt reply... But i wouldnt ask that if i were you... She probabily wants just sex, but you can change that if you make her feel more comfortable next to you. Tell her something about you that you wouldnt tell to anyone so she can feel more secure next to you and when you get to that talk... Then send her sms and see if she will answer you
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CHAT