What a hard, hard time you have both had in the last few months. I’m very sorry for your losses. And I’m very sorry that your boyfriend’s grief is so devastating to him. Believe it or not, it is usually easier for people to come to terms with the loss of loving parents than abusive ones. My guess is that he was holding on to the idea that he could still get some of the love and affirmation he wanted and needed from them. Now there are no more chances for that to happen. In addition, since he is in his 60’s, I have a guess that all these deaths have confronted him with his own mortality. Most worrisome is his idea that he has nothing left to live for.
If only he could pull out of his grief long enough to see that you are offering him the love and support he has always wanted. He could treasure the time he has left in the world (which, by the way, could be another 30 years) instead of giving up on life and love. But he is too depressed to see that.
Regardless of his “business reasons” for not getting individual therapy, it is probably what he needs most right now. A short course of medication could lift the depression enough so he could think. Therapy that directly addressed his grief and losses could provide him some much needed relief. Please assure him that professionals take the rules of confidentiality very seriously. No one needs to know that he is seeing a therapist.
If he won’t consider that course of action, then please do go back to couples therapy. It is a legitimate use of couples work to talk about your shared grief and how you can support each other in this difficult time. I’d stay away from conversations about marriage right now. The most pressing issue is his passivity and withdrawal – and especially those statements about not seeing what he has to live for. Once he feels better, he’ll be more able to figure out how to accept love for the rest of his life instead of staying stuck in his anger and sadness that he didn’t get it when he was young.
I wish you well.