I'm with all the other males here: I can't tell. I have no clue if a girl has any interest in me and the one time that I thought that one was, it turned out she was a lesbian so that should give you an overall idea.
To women: men don't pick up on subtlety, please be more obvious because we are idiots.
To women: men don't pick up on subtlety, please be more obvious because we are idiots.