I know the feeling. My life completely changed after 2014 when I had a mental breakdown, was hearing voices then was hospitalized, twice. I felt I was ruined after that. But I have come to terms with this illness (whatever it is that I have), and I have to accept it.

We can still have feelings of contentment, peace and happiness after mental health issues interfere, I do believe. We may not be able to retrieve all that we had in the past, but acceptance is key to being able to move forward with a sense of peace. And it sounds like you have come to a place of acceptance and are not dwelling, which is great. You may feel the loss, but there is much more happiness to be had in the future, too, if you look at it that way and seek out all the various ways to still be happy. ****hugs****