Is there a history of infidelity in a prior relationship for him? (I need to get some history to be able to advise you competently)
Yes, his ex wife cheated on him. I have never cheated on my husband, and after our rocky marriage, I have no desire to even talk to another man.
What do you suggest?
Are you still there?
Okay - well it sounds like that might be where some of the insecurity is coming from. So at the very least, there's a concrete reason that makes sense. However, there may be a couple of things you can do to ease his mind. If you don't feel like initiating sex (because you're understandably tired), have you tried touching him in a caring manner and saying that you love him very much and would like him to hold you (in lieu of sex)? I'm not sure of the parameters of your job, but does he know any of your co-workers, etc? Being very transparent with your relationships with other should help a little.
All that being said, you shouldn't be subjected to constant accusations based on his fears from a prior relationship. Have you tried couples counseling before?
No problem! It can be so hard when you're in a helping profession (I relate with that, for sure). Caring for ourselves is so hard when we're trained to take care of everyone else. I wish you the best of luck and I hope that you get the support you need.