not a peep

[Dom R]

i think that it is important to give him a letter.
Explaining what you are doing, why you are doing it, and what kind of behaviour towards you would make you consider changing your mind.

To do otherwise... to plan to just "cut him off" silently... would be uncaring, and inconsiderate.

Even though he is being horribly selfish and pigheaded towards you... i think that you do care... and that you would not want to be seen as otherwise by him.