If you are having to look after him while you're the one going through a TBI, then clearly something needs to change.

Beyond that I don't feel qualified or knowledgeable enough to say yes or no to such a sensitive question, but just wanted you to know that I'm listening and feeling for you.

One suggestion - you could look at separating for a while, see how that works for you and see if you get better without him around, but without having to make the decision about ending it for good. That way you might avoid the stress of going through a divorce while you're this unwell, and the worry that you were making an irreversible decision under such difficult conditions.

Best wishes