To add to this, don't go out of your way to break social rules, but don't worry that much about following them to a T. I've had a few times where I approached a girl with earbuds in, which is generally seen as bad, and her hair covered her ears so I didn't see the earbuds, but she was clearly fine with talking to me and enjoyed the conversation. If she said she was busy or ignored me, I wouldn't have pushed.