My best friend's cousin is living with him at his parent's house for a few months. So I started talking with her being cocky and funny and it worked, I built attraction. After a few days I noticed that she was very friendly with me and that I could give it a try; well I did kino escalation and she was receptive but after that I just blocked myself. I thought that I did everything right but something was giving me a mental lock down and I couldn't go on, so many opportunities and I didn't took the chance. I believe I blew it, and I don't know if I could do something to amend this. Early today everything was going fine, but tonight after leaving I had this feeling of discourage and failure.

This always happens with me, I build attraction easy but I always blew it when I go trough the comfort zone to the seduction phase. Is there a way to improve this?

Don't put the pussy on the pedestal.

Yep