[jgn]

It might be worth considering that some people just work/study so much that a normal relationship just isn't going to happen. I imagine grad school and early startup life is like this, to some extent. Personally, I just don't balance my life that well; too much time goes into studying and hacking.

A "pickup artist" did math similar to this and concluded guys should spend very little time on girls that aren't interested in them, as it's emotionally taxing and numerically daft.