Wait what? A guy who DIDN'T pay attention to the fact your tits were hanging out in the open? I'm amused that you didn't immediately realize he was gay. Any guy who claims he wouldn't react to it, is either gay, or secretly gay. Any straight guy saying otherwise is a liar, or not really straight.
Also, women falling for gay dudes, while not common, isn't exactly rare either. It's almost always the masculine gays though, the ones you don't realize are gay until they mention it or you see proof of it. It's not the sassy feminine gay men who clearly aren't trying to hide it.