The decision on what to do is totally up to you. Only you can decide what to do. The important thing is you do something and gain control of your situation. For so many months you have been reactive to his behavior rather than proactive. It's an old cliche, but the best defense is a good offense. Start steering this situation the way you want it to go. Quit letting him control you.
The bottom line is if you send the letter, be prepared to follow through with it. If you decide not to send it, then go file.....tomorrrow. You can do it.....
Me: 44 S: 17 and 7 Final-6-13-08 I once went to a psychic who told me I would soon feel cheated......