Lesbian Love... :(

Hi. I'm a 17 years old girl, who is looking for forgiveness... I'm a lesbian, and I can't control it, I swear... I masturbate while I think about girls having sex... 2 years ago, more or less, I "slept" with a friend's girlfriend, and I became really really excited... we kissed, and more things that I don't to say, 'cause I'm ashamed... Do I deserve forgiveness?