So I am able to hookup with a lot of girls, but after that they either stop texting me or want to meet up again. But after the second meet up, which usually involves something sexual, they stop responding completely. Why are they initially really attracted to me, but then all of a sudden lose complete interest?

No offense, maybe you're just bad at sex?

Does she climax? Do you cuddle afterwards? If so, what does she talk about while cuddling?

Are you making your intentions clear? Is it obvious right from the start that you are hitting on her? If you are hiding your intentions and then suddenly go sexual you can come across as a creep. She may not feel comfortable with you.

Also how hard are you going? Are you calibrating to every girl or just have one way you interact with them? Bud more comfort with them. Say and do what you want when you meet. Don't suck up to her. Be in your reality, your world and take her in. Have fun I the interaction and just don't care what she thinks. Play withher and then also have that playful seriousness in your eyes. Be mysterious, at onepoint just shut the fuck up and let her do the talking. Just look at her. The one talking is the one qualifying. Let her open up to you. It will come with practice. Keep at it.

Are you setting up a next encounter at the end of the one you're in? Do you both say you had a good time? You've left out a lot of details here. What is it that you do or don't do?