This is my first post, hopefully it will be one of my last. I am 18 years old, slightly overweight and just under 6 feet. I am in a serious relationship with a girl and we've been dating for almost 3 months, hooking up for 4. I love her, and she loves me, and when we're hanging out or just talking there is no stress or problem and life is perfect. But when we get to the point where we are becoming intimate, I get pretty hard from touching and kissing and can maintain an erection during oral sex and can ejaculate during oral sex, but if I think about actual sex or begin to attempt it my penis goes soft. I am in love with this girl, and I know it hurts her that for some reason we can't have sex. I have a couple of ideas for this: first it's anxiety. I was not popular or happy in high school and very self conscious. In college now I have plenty of friends, I'm comfortable with myself, and my girlfriend is hotter than any girl I thought would be interested in me. Being worried about performance (I was a virgin before I met her, and technically I still am?) definitely contributes to my impotence but we tried to have sex two months ago and it's still a problem. My second idea is that I may be addicted to porn. Scratch that, I am addicted to porn but I don't know to what extent. I've never gone more than 2 weeks without jacking off, and besides a few vacations and other exceptions I have looked at porn every day since sophomore year. I'm working on both issues, I'm just not sure which is more related to my sex problem. I would hate to have this relationship end for a reason like this, especially since I've never felt this way about a girl before - ever. So any advice would be greatly appreciated.