Mate there's a video you might want to watch here:
http://video.google.com/videoplay?docid ... 3621883092
Shows you how messed up a lot of PUAs are. I mean the whole community sort of originated with a bunch of obsessive compulsives trying to wrench themselves out of social awkwardness and bad relationships... For example Jack Coxwell
http://www.mypuajourney.com/ got a girl pregnant in high school, dropped out and then they broke up. Mystery and AFCAdam didn't get any girls till they were in their twenties. David D said he wussed it through school and got his first girlfriend because he was desperate.
Anyway the point is, if you're happy with this girl, don't worry about the one-itis label. Just run with your instincts until you break up. If it wasn't love, well, at least you gave it your best and you can get into pick-up later. If all you want to do is raise your self esteem I'd say join a team sport or meditate or some shit.