Apologies for namechange and if it gets a bit personal 
I am with a lovely lovely man and we have waited 4 mnths before sleeping together. Our first attempt was last week and was a total non starter, he couldn't maintain his erection at all once the condom came out, and we have tried twice again since then with no luck. We both put it down to first time nerves.
Last night he did manage to keep it up and get the condom on, but it was a case of about 30 seconds of actually being inside and he was done. This happened twice and both times it took a lot of effort to get it up in the first place.
He is a great guy and tbh I have been waiting to sleep with him so we weren't rushing but it actually hurts a bit to know how worried he must have been about me finding this out. He says it's always been a problem, and has actually been very honest with me about it, sayign we'll just have to keep trying. And I do really care for him so of course we will.
But we are both only in our (late) twenties, fit and healthy. His longest relationship has only been 4 months and I suspect that this was the reason, and that it's knocked his confidence even more :(
The truth is that of course I want to help, but I was so uncomfortable last night. I really did feel like it was a case of him using me to finish him off, which is an awful thing to feel :( I really disliked the 'quick, now!' element of it, I got no enjoyment from it at all. If anythng it made me feel a bit used, which again is an awful thing to think. He was very generous afterwards, made sure I came with some nifty fingerwork, but I felt a bit empty. I really do sound very callous writign this all down, but I am trying not to be. I have been single a long time and tbh I don't have the biggest sex drive in the world anyway. But I want to make love to him. I don't want it to be like this. It's making us both so insecure. I liek that we can be open and honest about this problem, but at the same time I am worried to voice my concerns in case it makes his problem worse.
Is this somehting that will get better in time? He can get an erection, he just can't maintain it long enough to have any kind of intercourse. Do I just have to accept it and keep trying? It's such a shame that it's even an issue, I like him so much but it's bringing out my insecurities as well. I know it's not my fault. But at 29 should he not have been to see someone about this before now? Maybe he is resigned to it being this way forever? I just don't know if I can resign myself to that as well :(