What about creating some mystery, instead of blocking his number let him call and get a message from your answering machine that you are out having fun.
I know that in my sit. if my XW doesn't know where I am at or what I am up to she starts pursuing me. But when I quit being a bit mysterious she backs off.
I just think blocking the number may close the door too far. Remember you don't have to answer when he calls, if he calls and you don't want to hear the phone ring step out of the house for a while.
