Sometimes it is far more pleasing to want something than to actually have it.
And on a side note, maybe the reason you can't bring yourself to really care for a girl is because you're too busy not caring about yourself. I hate to say this too because I used to be the same way but seriously...any girl that is actually worth your time for more than just a bang is not going to want someone who hangs around eating nasty tacos with beer and drugs all day.