Ok I'm 15 and a sophomore in high school, the girl I like is a freshman, and she has a boyfriend. We talk a lot on myspace, and I write a lot of poetry for her but I just want to know what I need to do to seal the deal and get her, I don't know what her boyfriend is like but I desperatly want her, can someone help me??

How is her relationship with her current boyfriend?

If she already has a boyfriend, I think you need to step back and let them be. Be her friend for now, and if something happens to them in the future and they break up, then you can pursue her, but for now just let them be.