First things first: sorry for my not so good english
I started with PUA a year ago and was before that really bad with women.
Anyway, since then I've had 8-9 ONS. I see if a girl is attracted to me, I tell her she's cute blablabla, jump the shit tests and thats it. The less I care about the girl or outcome the easier it is. Two weeks ago I talked 1 minute with a random hot girl while I was ordering beer, I wrote my number on the receipt and went back to my friends. Three days later she is sending me horny messages. My game is mainly crash and burn, the results I get are ONS or day2 with sex. To conclude i do things i couldn't imagine doing one year ago. But, of course there is a onitis
I was flirting a little with her, joked about that she's just a baby (18y old.), then she left and I stayed talking to her friends. I gained all her friends attention with storytelling and when she came back she was just standing looking at me. She tried to get my attention but I just continud my storie. I'm not confident but she was displaying every fucking IOI there is. I took her number and a couple of days later I take her and her friend grocery shopping. We have fun and talk a lot and I start qualifying her, it works and when her friend was outside she says that she is the smarter one.
After a while at my place (her friend was there to) I lost attraction and they left. After that she wasn't ignoring me but I could sense that the attraction was gone. I was a little to needy with messages after that, asking her out and she was just replying "can't this time

" and other excuses.
I asked her friend and she's just saying that she's not into me, that I'm too much of a nice guy for her. After that I once met her at a club and took the oppurtunity to IOD, I just told her that I was curious about her but that she's way to imature.
Is this a lost case? I know it would be easier to just move on but I really like her. Is it impossible? I haven't seen or talked to her last 3-4 months.