Many people have told me this: When you are thinking of doing something - like your letter or demanding a committment or whatever, ask yourself if this is bringing you closer to your goal or further away. I'm thinking that it sounds like your W is not in a place to say that she will commit to the marriage.
Sooooooo, if you don't care if you drive your wife further away then, do what you are describing above. If you do care and your goal is to try to save your marriage, then keep that to yourself.
