How to help my husband?

I would like to talk about a problem regarding my husband. We have been married for 10 years and we love each other. However, for the past few months he has been “lost”. He says he still loves me and doesn’t want to live without me, but he is “emotionally disconnected” and feels guilty for not loving me the way I love him or the way he “should”. He is also lost in all other areas of his life. Feels tired. Out. “Switched off”.

I guess it’s a burnout or a depression, not too severe in the sense that he’s not in bed with no energy at all, he’s working out, working, taking care of the kids, seems fine, has energy, but there it is, he says he’s off and lost and doesn’t understand what’s happening to him. He says that the only reason he would eventually want to leave me is to give me my freedom and to be with someone who will take better care of me than he does right now. Except that I want to stay with him, and I won’t be happy without him or with anyone else (I love him so much, I choose to believe that we will stay together all our lives, because I want to).
I would love to help him.
For my part, I am absolutely not lost. I feel strong, loving, right where I should be. I am sure of myself, of my love, of my marriage. But how can I help him? He won’t see a shrink, he won’t join Scholars. I can’t do this job for him.

What can I do?