I am a 23 year old virgin, who has only kissed a girl once. Many hot girls like me but I can't have sex with them. I never really approached many girls until recently when I found out about this PUA. I have now read almost everything about picking up girls, I am a bit more confident however still I have had no luck.
Recently I have been going out on my own 2-3 times a week to practice. The last 3 times I met 3 different gorgeous 20 year old students. However I always lose them before I ask for the number (Should I just ask for her number as soon as i know she is interested in me?).

Last night I went to a trance club, this HB9 20 year old girl started dancing in front of me so I grabbed her and danced with her for a quite a while. I escalated kino quickly, and she ended up letting me touch every part of her body while dancing, and she was squeezing my hand etc.
She took me to the side and then asked my name etc. I told her, then I took her to find a quieter part of the club so we could talk (maybe I should have just taken her home straight away?). The club was too crowded so we couldn't find any seats, so we talked by one of the bars about usual stuff like where she is from and I made her guess my job etc. However after 5 mins, I noticed she was playing with her hair, so I moved the hair out of her eyes, touched her arm and waited for her to look me in the eye, getting ready to kiss her (I have never initiated a kiss before).
But she just walked away, I followed her to see where she was going, just to the toilet. I waited nearby the toilet until she came out.
While she was in the toilet I was thinking that I will just kiss her, then ask if she wants to leave the club, for some food or something else, and get her phone number in case I lose her. When she came out I was sure she looked at me and just carried on walking to the dance floor area, I tried to follow her again, however I couldn't find her again after walking around the club for about 20 mins.

What the hell am i doing wrong?? Things like this happen EVERYTIME I go out. When I lose a sexy girl that I have spent significant amount of time with, it really upsets me and then I am in no mood to try get any other girls, so I just leave the club and try not to cry too much.

no offense, but you sound kind of scary.

don't follow a girl if she leaves, just leave and find some other girl(s*) to talk to. If she's really interested she'll find you.

I don't think you're scary at all, but remember that women can smell desperation a mile off, and it is not attractive at all.

My advice would be to try something like yoga, or other relaxation tecniques, before you go out, so you are calm, and give off the ora of confidence and not despiration. Perhaps have a little self anchoring routine to use in a club to calm yourself down a bit when she uses the restroom.

Also try not to think about the end result too much (i.e the number, kiss, sex etc) but keep your mind clear, remember what you are aiming at, but don't simply concentrate on that. As cheesy as it may sound, try to enjoy her company a little more, rather than seeing the whole thing as a challenge/chore. Then if she does just walk off, at least you have enjoyed yourself, and you can simply move on.

Remember you can have all the knowledge, but if your giving off the feeling that you are a little desperate, it simply might not work however good a PUA you are, so just relax,

Don't worry, it will happen, and when it does it will be like the floodgates have opened and you will need a bigger memory card on your mobile just to keep all the numbers in!

Have faith, you'll get there.