Over the course of 3 years and 7 different sexual partners, I've noticed my desire to have sex decrease with each day. I'm 17 and I want to know what my problem is. Me and my friends with be sittin around shootin the shit and they'll start talkin bout gettin girls to hang out with. I don't say anything. The only thing that goes through my mind is oh shit. When we are out at the mall and stuff, i'm afraid to go up to girls and talk to them. During sex, and this happens 90% of the time, my penis will go numb, i lose feeling, and eventually start losing my erection. I don't enjoy it past the first 5 minutes of intercourse and It seems to turn into more of a chore than a pleasure. I'm 6'1", 190 lbs. Not really muscular, just average. I have bad self esteem issues. The main thing I always worry about before sex is performance and is this girl going to laugh at my 6" dong. It just seems to be getting worse and worse. I find it really hard to talk to an attractive girl without making an idiot of myself. I don't know what is going on or how to fix it so I hope someone else does cause this is destroying me. I've had suicidal thoughts because of it. Please help.