are you with the right sex. i mean are you sexually attracted to your girl. not saying anything but i grew up a a gay teen and i couldnt get hard with a chick unless i thought about guys. not saying your gay but just asking
Can you get an erection when your not going to have sex with your girl? If so you are probably just nervous, it happens to alot of guys and gals when they first have sex, try to keep as relaxed as possible. And obviously, be smart and use protection.