How much experience have you had with girls? Do you have female 'friends' that you can learn from - ask questions about girls, reading them, dating, hookups?
I cant say that I was always confident..I wasnt! But I was athletic and had a ton of male friends. They (without wven knowing it sometimes) taught me how to relate to the opposite sex. Growing up JW it was impossible to navigate dating. In the world though, it was so easy...I mean, took no effort. But I realize that is MY experience and not everyone will have the same experiences as myself. But underneath it all - everyone wants to be loved and to give love...remember that. Their timing for love may not be the same as yours, but that desire is there.
Just be cautious of saying things like "girls are xyz..." basically lumping them all into the same negative group. People can and will take that exactly how it is written - not how you may have intended. Im not those girls who hurt you. Unless it was someone on this site that you hooked up with, then none of the women on this site were the ones that hurt you. But comments like tou made hurt US...
Lastly...body language is HUGE. Social queues are how humans interact and communicate - with and without words. Read up on that stuff. Maybe you miss signs or werent aware of them, when it comes to girls. And believe me...women can SNIFF out insecurity and a man who is desperate. Not saying YOU are, but a man who falls too fast is almost a red flag for a female...