I'm 15 and I really like this guy. I've known him for like 7 months. He's had sex before and he wants to have sex with me. I want to make him happy but I don't know if I'm ready. I want to have sex except I'm not 100% comfortable with my body. I feel like my "part" is different. And I don't know if he is going to want to stay with me. HELP!