Don't worry there is nothing wrong. I am the same. I suspect that as you age boys / men become a little more jaded, a little more selfish, a little less attractive so it is really hard to find someone to care at all about. I also feel they get a little bit more reserved so you don't see all those traits you might have crushed on before.

I am trending downward age wise lately. But even there I find a younger guy I could get a crush on but I am kind of put off by the fact that he is so young.

There just aren't a lot of good stock lately.