please Help me !?

Serious Problem!?

k i never thought i would ever feel this way towards a girl before! but i have a problem! k i love this girl( i think)! but she goes out w/ this other guy! but everthing they do together she always invites me to go w/ them where ever they r goin! do u think shes tryin to get him to break up with her that way she can go out w/ me or just being overly nice to me! and if thats so do u think i should just give up and go on about it or hang around! I mean we bought xmas presents for each other that her b/f didn't even know she bout me until the other day but she acts like she loves him but she always wants me to hang around! so wat my question is the next time she ask me to go somewhere should i say no or go w/ the flow! i mean i got really deep feelings i thought i would never have! LOVE HURTS! thanx for any advice.. preferably from mature people! THANX