I have been employing pua techniques for nearly a year now. I haven't done too many posts, however I believe this question requires advice from someone who really has solid game.
I can do well with a girl, create attraction, close and so on. However I still can't get out of the frame of mind of seeking validation of not caring about the responses of all the girls. If I come home and don't pull, I feel like its been a wasted night and feel shit.
What steps can I take to not giving one shit about the girls opinion so that Im not seeking validation and annoyed when rejected? How do I come home from a night of not pulling and still feel great about the night?

Stop being outcome dependent. Go out to simply practice and to have a good time.