Am I Broken ?

So . My friends always talk about how great the sex was and how they orgasm . But since I've been sexually active ., not ever have a I had an orgasm .. I don't even cum . ?(idk if it'll count as the same thing) my SO and I have great sex (I think ._.) But for some reason I never "finish" most of the time I don't even care that I don't cum or stuff because I had a great time with my SO but it does worry me at times .. Hope this post made sense .. Help /.\