well, there are many situations in which you can say "stop..it's over" - So many man, so many minds... but i think more important it - how you should say "good bye". To my mind it's very bad when you and your former beloved after "break up" become for each other strangers. I think both of you should try to keep a good (or even friendly) attitude towards each other. Of course i don't speak about situations when he (she) cheats you and spend his (her) time with other women or men - and in this case, i totally agree with -Irene-.