You will need to decide when you need to change your number. Sometimes, hope can open the door to a renewal. Other times, hope can keep the door to emotional abuse open.
I can only speak about how I feel. I wish all of this had not happened. He called today and left a message, and said he had to ask me a question. I would think that if it was so important that he would leave the question on the answering service. So far I have been okay with his leaving a message. I've had my phone numbe for 17 years....and well, it would be tough to change it now, but if I had to I will.
You just take care. In time the pieces will come together. Be strong. I have decided that even if my ex wanted to come back, the question is...is this really the partner I want for life!