Does been single at thirty condemn you to a life of solitude?

i haven't dated in about two to three years because the last guy ended up being a jerk. I started to date him and he wound up been married. Something in my book really rotten to do. I wanted to kill him at least to ease the pain his wife has to put up with. So know I thing all men are s and the good guys are probably getting penalized by this. What should I do to get over my fear?