that ladies are often attracted to men they can't have, or shouldn't have. Forbidden fruit, and all that. Your (and my) experience seems to confirm that.
I dunno - feigned disinterest in the romantic side of things might just be the ticket. Of course, then you'd have to develop a sense of timing as to when to drop the disinterest. A decent 'mating display' is important, too, I think. You have to give the impression of being a good catch... That means the trappings of wealth, and/or good health.
I'm still working on the last bit, myself.