1) do not make assumptions.. if you think the relationship is over, please tell me and don't assume that I know. As far as I'm concerned, if no one says it isn't over, it's still going on.
2) Do not make me cry and then try to comfort me. YOU'RE THE ONE MAKING ME CRY, YOU MEANYHEAD!
3) Don't give me any cliche' lines... like the "it's not you, it's me" one... I am likely to laugh in your face if you try that
4) Don't lie about why we're breaking up... I want to know what I did wrong, or what went wrong, so I won't do it with the next hot guy in line
5) Don't stop me at the supermarket a few days later and ask me if I'm still mad at you. If we broke up on bad terms, chances are, I am, so don't bother asking.
6) Don't be a kid and ask your friends to ask my friends what I've been up to... be a man and ask me yourself if you are truly that interested.