wow this does sound like a nightmare...pumping a way while your girl is looking up in the air or filing her nails or in pain and dreading fucking you.
sorry to say but I cant stand even watching a "porn star ending"...often asking what is up with these dudes who have a beautiful woman in front of them sucking their dicks, letting them fuck their pussies and ass but have to jack off to cum.
who knew...frigged men??
as others have said through edging men can learn to hold back ejaculation and some myself included have learned to have multiple orgasms without actually cumming. it is actually more satisfying for me to have an orgasm without cumming. but this is far different from simply not being able to achieve orgasm OR ejaculation. sounds like something that should be discussed with your doctor really.
it is hard to find that balance isn't it. men seem to believe in extremes...with most wishing they had a donkey dick and able to fuck for hours .. not first imagining the possible number of women who would not prefer to be warped for hours with a big dick. and then these men who wish for this have not imagined how frustrating it is for dudes like the OP. being compatible with your partner is what we ought to seek...not easy I know. I would imagine, don't know since i have not been with enough women personally to say definitively, that there are as many women who cum fairly quickly and therefore would like their man to cum shortly thereafter as there are women who take a long time to cum and need their man to last at least that long...and of course those in-between.
human sexuality....not a simple thing is it.