Hey mate,
I've just read your post. It takes an awful lot of bulls to say that statement, so well done! I can relate to feeling crap after being knocked-back. How I have gotten over this, is basically not giving a sh*t. Try and find it funny if a girl rejects you, and congratulate yourself for having the confidence and bulls to go to the women in the first place. When I was younger I never approached, and its only lately i've done it. So keep on trying!!
If I were you, just keep trying. If you get rejected think about what you could do differently, and keep trying!! Try and remember that sometimes women might have a hundred things going on in their life, its not you. They could not be having a good time in life right now!!
There's a hundred of small things you can do to improve your performance. Try and smile and dress well, and just try and have a conversation, and keep it simple. There are loads of books and advice on this website, so just pick and choose what suits you.
Try not to get it to get you down. Feel good that you are approaching!!!!
C