Thank you both PMD and RB. You are both absolutely right. My bitterness serves NO positive purpose. I was not so much bitter, as hurt, and since I don't like feeling hurt I blindly chose to blow through the hurt and go straight to anger/bitterness. My mistake. Good thing my bitterness was only vented here and NOT directly to my W, so thankfully no backsliding to be accountable for to her.
W always tells me you can't baby sit your own kids.
I happen to wholeheartedly agree with your wife. My MIL will sometimes ask me if I am "babysitting" my children on any given night? I politely say yes I am blessed to have the opportunity to spend time with my children and I smile because I do consider my time with them a blessing.
Again, thank you both for chiming in. I always feel better knowing that others care enough about me and my journey to give of themselves to their DB brother in need.