I'm too nice!
I'd say things like " Let's take a break for a while
to re-evaluate our feelings for each other..."
Once, and only once, did I kiss another guy in the
presence of a current boyfriend. When he complained,
I told him I decided to put our relationship on ice
for a while.
I was very young then and still ashamed of my action.
What goes around, comes around, so I try to be nice -
always!
Ideally: I become such a witch with a capital "B", that the guy will be running like hell, and never look back