I would agree with 99sesport (though I don't take such a religous look on it, but no disrespect at all). Part of the problem is that you are both trying too hard and too frequently (being a man-whore

) and that you are looking in the wrong places, so to speak.
The chicks you are messing with now, who don't care about what you do, aren't the girls that are looking to make a life with someone now, so of course they don't look like anything you want to spend your life with. It's hard to explain this from typing, but I think thats a pretty good explanation.
When you are ready to settle down, those will be the girls you will start to attract, and thats when you will find what you are looking for in a life long partner.