I am going to bring my answers over her to this thread. I hope you don't think I am judging you, because I am not. You asked for a mans perspective and I gave you mine. That is it. Your WH is not acting like an adult. That is clear. I have the same thing in my marriage, my wife is acting like a child and running away. That doesn't mean that I have done everything right either.
IMHO your marriage, the vows you took, should come above "needs". I think you feel that way too! I am sorry that out spouses do not feel that way. It is something that they must learn. If not then they will remain in the crisis a perpetual child, never growing up.
As far as your D22 goes, my D24 is bipolar also. So is my mother. She needs to get on meds. She will not get better with out them. My D24 has been on "abilify" for 3 to 4 years it has made a world of difference. My mother on the other hand goes on and off her meds all the time. She is a mess!
There probably is nothing you can do but if there is, please jump in there with your D22.