So... this may sound cliché but I love a girl with a boyfriend and she just wants to be friends. She's told me that I'd make a "perfect boyfriend" for her,don't know how sincere she is. I've known her for about 6 months, we've hung out a lot and she's so much fun and she just seems perfect. I'm not big on relationships but I was just wondering what I should do? Half of me wants her to be happy with her current boyfriend who she told me she loves, other half is selfish and wants her for myself. Its driving me crazy. Should I just give up on her or stay friends or what?

Give up. She has a boyfriend, she's told you she loves him, and she's told you she just wants to be friends. She's told you everything you need to know to make this decision.

You're right, I just needed to hear it from someone.

Well that's all up to you . If you think you love her you should think of telling her how you feel. But it might come at the cost of your friendship. So you should think of what's more important telling her how you feel or having her as a friend. But staying in silence and still being her friend would for me just cause pain of wanting something you can't have. That girl isn't really making it easy on you either telling you those things and giving you hope that might be false.

Check out this guideline: https://www.askmehelpdesk.com/dating/guidlines-what-do-do-if-person-like-already-relationship-463250.html

Not much you can do when she already put you in the friends zone.

Don't get involved. She's not available because she's already taken.