I agree to consult with a L and know how the process works. NG, that was great analogy with the lighthouse.
I think that as much as you love your husband, love him unconditionally. To do that let him go on as an individual to find what he needs. It is a hard thing to do.
You can go on with love in your heart and keep your dignity intact. He may or may not return to you, but you will be a better person for it.
Take care.
A warrior does not give up on what he loves, he finds the love in what he does