I'm curious to see people's opinions on this. I'm friends with a girl and lately there's been a lot of casual flirtation on both sides, but of course it develops further and further and eventually I find myself wondering "Where are the lines here, what's appropriate and what's not?" Do you feel there are boundaries to this sort of thing? Things that should be kept personal. Or do you feel like the sky's the limit if both parties are over any awkward feelings and are usually very honest with each other anyway.