Is it normal to not want to be happy?

I'm not an emotional person. Not the usual not showing emotion, I just don't feel much. My train of thought with not working directly towards my own happiness is that it doesn't have much effect on me. I would much rather give someone else the opportunity to experience and savor the emotions that I would just squander. Some of the more drastic things I've done are not asking girls out on dates or to dances because I know for a fact there is someone who wants to go with her way more than me. I usually let my friends and classmates do better than me on tests even though I'm the one that nudges them through homework problems. Some people think I'm simply throwing away my potential, but from my viewpoint it's as easy as this: Why should I work on my own goals and get less out of the experience when I could be opening doors and clearing paths for other people who would get much more from it than me?

I do occasionally flip on my potential to see that I still am as competent as I expect myself to be just to make sure I'm not actually inept and justifying it with my thoughts above.