I like this girl and until now, i though we were good friends but...?

I really dont think she cares about me, i think that she feels that im just another guy. This girl is so POPULAR and all the boys flirt and talk with her, and im good friends with her and hoping to get close to her but i guess she thinks im just another guy because she never calls me (i always call her =[ ) she didnt even wish me happy b-day even though she knew, I guess because she is really nice to everyone. How do i get closer to her? How do i get her to like me without me lookin desperate?

Plz help, 10pts for best answer.I like this girl and until now, i though we were good friends but...?
You have to find out what she is like and WHAT she likes before you can become someone she will be into. But seriously, are you doing this for the right reasons? You sound like a nice and sensitive person (sensitive in a good way). Try to be cool for her friends. Whatever you do, don't come on too strong. Girls just hate it when a guy they aren't that into are pushy. If her friends don't like you- you have no chance. Be sweet to her but show a little backbone too. Be yourself, be confident, mature and cool.Don't agree with everything she says. She'll know what you're up too. And stop calling her alltogether. If you are more aloof you won't look desperate.To get closer to her, get closer to her friends. Find out what she is interested in and do similar things. That way you may run into her more often and you can talk about how much you have in common and how you like similar things that she likes.To not appear desperate, don't be desperate. Become someone she can respect and admire.How do you do that? You'll have to figure that one out on your own.Having said all that, consider... is it really that important becoming someone else just so this girl will like you? Don't abandon yourself just to get someone else to like you.I like this girl and until now, i though we were good friends but...?
Try to improve your habbit, personality, and avoid continuous staring her, ask her some brain teasing questions, she will respond
just one day walk up to her casually and ask her if she would like to go out with you some time...if she says yes then there might be something there jus try it out....be brave....if she is your friend she will be honest with you..
Aww hun.. I can't believe I'm saying this. If she didn't wish you happy birthday and she knew, she isnt really worth your time. I think you should try to find someone else who would call you just as much as you call her. But hey, that's just my opinion.

But if you want to get closer to her, try talking to her about going someplace together or just hanging out, and ask her questions. Try to get to know her better.

Good luck.