Most Helpful Guy
Hold out until you are comfortable, listen to your instincts. If you have sex now with these thoughts, it will be an uncomfortable anxious ridden experience, not what you want for your first. Worse if your fears are correct. Give it some more time!
Most Helpful Girl
I had that fear too with my boyfriend. We had been dating for two months when we finally had sex. By then I was ready because I trusted him and felt comfortable.
Don't worry if this guy has been with you for awhile without sex he really likes you for your personality too! he won't vanish if you have sex. If anything he'll be more attached to you :)