I’ve made friends with these 2 girls whom are roommates. One of which I’m really attracted to and want to be with. The other is more of a play mate. I’ve had lots of sex with the other girl with no problem, but when I’m about to have sex with the one I want my erection goes away! Oral isn’t a problem it’s just sex! I don’t have problems keeping it up with the other girl and I’m really frustrated! Please help