I think you need to slow waaaaaay down. You say that you guys have never kissed before, and she doesn't know how you feel. You shouldn't be planning your sex life already.
Do you really love her, or are you just trying to sleep with her? Love doesn't have to equal sex. You can be in a relationship and in love and not have sex, you can wait until you are both ready for it.
I would say, talk to her and tell her how you feel. But don't do it while drunk. Also, take it slow. Don't worry about the sex part right now.
Also, absolutely do NOT sleep with other girls to "get experience". If she is any kind of girl worth having, she won't care if you fumble around in bed the first time. She may be really turned off when she hears you have slept with multiple women before her. It could, and most likely would, blow up in your face if you slept with a bunch of girls first.