I'm curious - your DDay was 3 years ago. Has anything new happened since then? It seems odd to me that 3 years out this is happening to the point that you're getting the silent treatment.
I'm NOT judging your BH, or you. I'm just wondering what's happening that is stirring these feelings. Is this A season? Was the period after DDay particularly hard for him?
These things do happen. I understand that. The curious thing is that after 3 years, most BSs have realized that these feelings can just arise and we've learned to do a little checking before the silent treatment starts.
Again, not judging. Once bitten, twice shy is the mantra of any BS. It's just concerning that the hurt is still so raw for him.
If nothing has happened in 3 years, I'm going to recommend something other than leaving work as other posters have suggested. They aren't wrong in their suggestions as there is no right or wrong - I just have a different opinion.
As a BS, as sucky as it is, at a certain point we need to accept that the insecurities are warranted but we can't live by them. I would certainly apologize for causing these insecurities in your BH. I would ask what you could do to help him feel more secure. However, your life cannot be spent running to him at every bad feeling. Harsh? Maybe - but remember, I'm a BS. There comes a time when we need to accept that we've decided to R, and with that comes some hard times. We can't expect the world to stop at every whim we have regarding feeling betrayed. We need to accept that we will feel like this for no reason sometimes, and we need to learn coping mechanisms.
Again - no judgment. If DDay had been 6 months ago, or a year even, I'd say go to him. But after 3 years and no incidents, you both need to start asking where the line is. Where is the point where he should be vocalizing every bad thought, and where is the point where you need to risk your job to go hold his hand and apologize again?
There are 1,000 lessons for any couple in R. This may be one of them. I'm so sorry he's feeling like this. I know the feeling, and it's horrible. It really is. Hypersensitivity is really all consuming, and can cause so many internal struggles. I do feel for both of you.
Good luck, and just be there if he needs you. I agree with not being smug or condescending. He didn't ask for these feelings.
If you're still in MC, you may want to bring up some methods for each of you to deal with these moments. I'm sure they're hard on you too - never knowing what will come from the next text message, and wondering when your BH will feel better. And I'm sure all of this is co-mingled with plenty of guilt over the entire issue.
My best to both of you.