Lead by example... if you invest emotionally in yourself.. then she will probably follow suit.
The ball is in your court --- it's up to you to decide whether regaining your life is worth fighting through the irrational torment your mind has placed against you.
How badly do you want your life back? Bad enough to actually take action --- knowing this will probably be the hardest thing you will ever have to do in life?
Don't lose track of what's at stake --- your family, your life, your sanity, and ultimately... your happiness.
Get some help... counseling, therapy.. and if necessary... medication.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen