I'm just a boy

hi!
LOL.
Anyway, Damasa is right, who are you kidding? Hopefully not yourself.
It doesn't sound good actually. I might be a bit off base here but usually girls like one of the two better. In fact its usually pretty clear as a feeling to them.
Something usually prevents them from closing the deal with the one they like the best so they entertain both . . .
If you want to win the competition, by all means try, you just have to avoid being heavy, be flirty and do date type things while keeping the relaionship as physical as possible. Monopolize her dating time. That will be a key facor in victory.
But ask yourself another question. Why bother? I mean why bother to "get" a girl to like you that also likes someone else, when other girls will like you effortlessly?
When you could spend the energy on an automatically more positive relationship?
Too many girls on the girl tree for that.
I did it once. I took a girl from her 3 or 4 year boy friend. But after I completely won . . . what use did have for her anymore? The point was winning. And that was it.
Keep that in mind ladies, don't make yourself a prize that has to be won. The good hunter will leave.