Sometimes all you can do is try it out & see if it works.....I would imagine that it could have it's good & bad points......good that you understand what each other is feeling.....bad when you are both in a bad place at the same time because usually when one is in a bad place all understanding & sympathy goes out the door & only self is in view.

Hard to judge things like that without really knowing the personalities involved outside the mental illness issues because that can make a huge difference also.