Good sound advice from Michele. I do not think you should send the email until you are CERTAIN of what you want AND what exactly you are dealing with. Meaning that your email would read something like this....
.....I have had enough. I am finished with the drama that you seem so intent on creating and maintaining. I will not be a part of it any longer. You will find your things on the front porch. Deb......
If he is innocent of any wrong-doing he will read your email as just "more of the same" from nagging Deb. If he is guilty, well, I think he will read it as the same, just another empty threat.
I think that everyone here is trying to tell you to take some time on this one.
Let me know what you think-
Dawn
Also, wanted to let you know that I think that your email is hear-felt and right on point just don't think that he will take it that way.