How do I kiss my girlfriend?

Not to be rude, but I can't believe you're 15 and haven't had your first kiss yet. I had mine when I was 3. Well, when you take her home from a date give her a little peck on the cheek and see how she reacts. bad reaction, NEVER AGAIN. Good reaction, take her on a movie date and during a romantic scene look at her and if she looks at you go for it.