I have feelings for my lesbian friend and its killing me because I can't say anything...?

Oh honey, you have to talk to her about your feelings. It's the only way to be honest to you and her. Believe me, if she is a friend she will understand how you are feeling and will help you discover yourself. And an honest talk will let her tell you whether she is romantically attracted to you. It's not a big deal if she's not. I have lots of gay (and straight) girlfriends who I love as friends but am not attracted to in a romantic way.