I understand how you are feeling. I am diagnosed depressed, anxious, and bipolar. And trying to stay sober on top of that. But it does seem a monumental task sometimes. Especially when the 'down' times seem to last so long and the 'up' times are like the blink of an eye. I want to find some middle ground but can't seem to find it.
You are not alone. I cannot offer you any sort of help but I can tell you that you are not alone. Many of us feel this way.
Sending you big hugs.