Bright I do not think that there is any right or wrong here.
My feeling is that you are still deeply emotionally attached to your h (Nothing wrong with this btw) and understandably fear that initiating divorce proceedings will push him further away.
On the practical and financial side is there any advantage to your divorcing him?
I do not think you are yet ready to 'move on' as they say. You will know when you are, and all will become clearer. As you know MLC is a long term and messy thing, and a good proportion of MLCers appear to never wake up to what they have left.
I suspect that your hope might be that starting divorce proceedings might shock him out of limbo.
Btw, how your h feels about the limbo situation is neither here or there. Who knows what goes on in another person's brain. It is how it affects you that matters. learning to put Bright first is a useful life skill. Like the hair product ad, you are worth it.