I've had the same feelings myself, that I'm not satisfying my fiance, I usually last about 2-3 mins max once we start intercourse, and she never orgasms or seems to really get going. Though saying that, the occasions where she did seem to start getting towards orgasm we'd have to stop for some reason or another, whether her hip was hurting or something else. I always wondered whether she put the pain on because she didn't want to orgasm. I put the problem of me not lasting long partly down to lack of foreplay, she never seemed to want to do anything different, and it was straight from kissing into intercourse, with nothing in between (apart from the occasional hand-job).
But over the last week I've managed to talk her (not force her before anyone wonders, I'd never force her into anything) into allowing me to use my fingers first, since our daughter was born a year ago she hasn't let me put my hands anywhere near. She's complained that she hurts down there when we are having sex, so I suggested that using my fingers first might "open her up" more gradually (for want of a better way of saying it). Suddenly, I'm lasting longer, and though she's not having a full on orgasm, she's getting close to it, and a couple of days ago she actually commented on how she "exploded" herself (how nicely put
). Also, she said it didn't hurt.
I'm not sure whether you do this, or whether it would work for you, but it sure seems to work for me
Also, wearing a condom might help (if you don't already). Usually (and maybe stupidly) we rely on her taking the pill, its worked up to now (our daughter was planned). But last week I wore a condom because she had to come off her pill due to her being due on her period at any time, and again I lasted longer, partly due to the lubrication I suppose. However, my fiance said she didn't like it because it didn't feel the same as it usually does.