Chris,
I went back and read your original post again and it said something along the lines of "I wish her happiness didn't have so much to do with my own happiness." I think I misinterpreted what you were trying to say there. Sorry!

So you are saying that she brings you down? Is that it?

What are some ways that you can be happy that don't involve her moods? (short of an A, of course!)
If it were me, I think I would think of some very specific goals on what you want out of your M.
I want one night per week alone with my wife.
I want her to initiate 50% of the time.
I want verbal affirmation that I am doing a good job as a husband and father.

ETC.

Then be willing to show this to your wife and ask for her cooperation in meeting these needs and building a good marriage. In return, ask her how you can better meet her needs.

Whaddya think.

hpot