How to become friends with the girl i like and how do i make her lose interest in her current bf?

There is this girl i have like a lot and one day i went up to her and told her ';her wats your name'; and she was like ';erica why?'; and then i told her ';i dont know';after that i didnt know what to say.It got so quiet.What are some good conversation starters and i also want to become friends with her but how can i ask her if shell be my friend without creeping her out.Last thing is that she also has a bf so how can i make her lose interest in him.

THANKS to whoever answers =)How to become friends with the girl i like and how do i make her lose interest in her current bf?
alright first off there will always be that ackward silence in there somewhere. All you have to do is start talking to her. I did and now me and the girl I like are best friends. and you cant make her lose interest. If you try it could make things worse.How to become friends with the girl i like and how do i make her lose interest in her current bf?
Not possible my friend...the package has an owner...until that owner discards that package...its not your to take or borrow or anything else...let her be. talk politely and don't make any sudden moves. face it dude...you don't have a chance with a claimed one. That ship has sailed.