no matter what he mentions about separation or divorce, you can simply let him know that you will not stand in his way if he feels he needs to. I don't think you even really need to validate his feelings that he wants to. Not in the context of your sitch. Sometimes we will suggest the LBS say "they wish it were different, but won't stand in the way", in your sitch, I think we want to do the 180 on him thinking you are easily available.
If he brings up how he feels you've contributed, you can certainly validate by either saying, "That is something I am working on" (if valid) or "I remember it differently although understand you feel that way"
Even if this post is too late, this is how you could address this in the immediate future.
