Well, this is always better than blowing your load within two minutes every time, and there are a LOT of guys like that. What you maybe should try is changing up how you're being stimulated. I mean, sometimes I go on for ages during sex, because I'm not getting the full sensation. When I was going at it the other week, I had the same problem, it felt like I could fuck all night without coming, it just wasn't happening. Then I had her make a V-shape down below, and that bit of extra tightness made me come within five minutes. So I would experiment with all types of positions and different ways of stimulation before thinking there's something wrong with you, because thinking that will only make things worse.