Well, part of what happens in these sorts of string-of-bad-relationships things is that they, for some bizarre reason, feel inadequate if they do not have a mate, so they jump blindly at any chance for a girlfriend/boyfriend without referring to any real standards.
Relationships are meant to benefit both parties, not to fulfill some sort of requirement. If its obviously not going to be emotionally fruitful from the start, just don't do it.
(Not pertaining to the OP) What bothers me to no end is when people in a string of bad relationships then come here and instead of wanting to discuss their problems, they go, "Women are terrible bitches. Who agrees with me?" and only shows any effort or respect to those who agree with them. And then, of course, they do this at an odd time of day where the mods are asleep. -.-
/annoyed rant
Still, OP, I feel no obligation to have a boyfriend at this time. If I find someone right, I would pursue it, but otherwise I'd leave it be for now. Perhaps things would change if I were single in my 30's or something.