Just talk to her. Over thinking sucks. I do it too and it's better if you just tell her the truth. I'm sure she'd rather know it's not her fault. It's something you both can work on together.

last night my girlfriend gave me a bj but couldnt get me climax she was really sad because she had made a promise to her self i fell really bad she now thinks she sucks but in reality it was really amazing I just very sensitive

Sex is 90% mental and 10 % physical. You should just relax and if it happens it happens if not it was still fun!

Aw on your first time you probably felt too pressured! And sometimes it just doesn't happen, to both men and women. I'm sorry your girlfriend isn't more understanding.

Nothing to worry about OP. Provably some nerves combined with the fact that you still have to adjust to each other a bit.

Whether it was your first time, or just your first time with her, first times can be a little nerve wracking. You two should talk it out.

this happened to me as well. took months for it to finally work out but it will happen eventually, don't worry. The biggest issue at least for me was the pressure and stress and to some extent awkwardness that comes from the situation, and only serves to make the issue worse. The trick is to set the mood right and make it as stress free as possible, and to remember that even if it doesn't work immediately it will eventually you just need to keep try. Don't focus on the ******, and make that the point of sex. The focus should be instead on the feelings you get even without ******. The point of sex is enjoyment just remember that, and everything will fall in to place eventually.

I had this happen before, except my girlfriend decided to call it quits before 2hrs haha, being nervous has a lot to do with it, and it can block your ******.

Why don't you like having sex with her? Wouldn't that make you lose your boner?

Fake it, she doesn't get offended and you don't get a heart attack from "several hours" of sex. Congratulations on the endurance though