Mizzuno,
I think it might be a good idea to pause and look at things. You moved, hoping that the sun would make you feel good. Has it helped? Speaking from someone who lives in eastern Canada, I can imagine that some sunshine would really help.
What do you hope to achieve by moving back to northern California? It might be a good idea to figure out what you both want.
I hear guilt in your post and I can sure relate to that. The first couple of years I was in recovery, I really wanted to do what I could to help my husband be happy. (In reality, all I needed to do was to stop drinking.) Be careful that you pay attention to your own needs as well as your husband's.