Well my bf is 17 and I'm 16 we've been together over a year and we've been having sex for 10 months. We've never had problems before but I just recently went half way across country for a week and everything was fine before I left and while I was gone until a few days before I got back he told me he was having trouble getting hard. We've never had any problems having sex or anything but yesterday when we were messing around he was having trouble staying hard. When we finally got him to stay hard for a while we were having sex and he just lost it. Now he thinks this is going to effect the way I feel about him and it's gonna ruin our relationship. I told him I wud stay with him I didn't care if we weren't having sex as long as I was with him. He's now freaking out cuz he thinks it cud be something serious so I told him to talk to his doctor but he won't. What do you think cud be the cause of him losing it while we're having sex?