I can't ejaculate in or rarely around my girlfriend
I have been with me girlfriend for approaching 10 months now and we are very happy together, I consider this the only obstacle in our relationship.
We are both 17 years old and we have both lost our virginities to each other (debatable in my case)
Our first attempt at sex was a disaster and I couldn't maintain an erection but I put that down to nerves and that problem has now passed. The problem we now face is my inability to ejaculate with her or in her. I can ejaculate perfectly well when I masturbate but it seems any involvement from her makes it difficult or just not possible.
One thing we have tried is she 'plays with me' for as long as she can (with still no results) and then I take over until at the 'no going back' phase and she will resume control and then I can ejaculate. However with out my intervention this would not have happened. It has only happened once without my assistance.
At risk of sounding arrogant, not being able to ejaculate has a huge effect on my 'ego'. A man's role is to please his woman, and not being able to please her is taking its toll on my sexual confidence and after every failed attempt I feel slightly depressed which effects not only me but my girlfriend too. She starts to blame herself thinking that it's her fault because she's not pretty enough, but that is not the case. If ejaculation was based on looks this problem would most definitely not exist, it could possibly be the opposite.
It makes it worse for me because when she gets down about it it makes me more down because I know it's my fault but there is nothing I can do about it.
Please help, I am really scared that this could affect our relationship and I don't want to end up losing her over something like this. Is there some kind of treatment which won't involve her? I feel it would be unfair to drag her through a treatment. She's not long lost her virginity she doesn't deserve to be putting up with this.
All help would be appreciated, thanks