Let him go. That may seem a little blunt but anything else will worsen the situation. Accept his decision fully and plan your life in accordance. This doesn't mean that he gets to dictate everything. His leaving is his choice, but the conditions that you are left with is for you to have your say. Don't accept what isn't reasonable/acceptable.

But as I said, your best action is to put on a brave face and act as if you are fine with him moving out. That it's not a big deal for you. You don't need him. You may need to fake this especially at the beginning but the less a deal you make of this the better for you in the long term. Fight him on this and he will just remember you fighting, which will further cement his thinking that he was right to move out.

However I would also shake up your routine in the build up to his moving out. I know it is out of character for you to be an extravert, but there are many reasons to go out more now. Firstly he will experience time without you. Secondly he will notice you are not just mopping around the house feeling sorry for yourself. Ideally go out and do something as that will help distract you.

Best wishes


R 25 years
M 14 years
S11 & S13
Working on it alone since Oct 2014
M in trouble a lot earlier (~2 years)
Feb 2016. 1st R chat in a yr.
Next R chat Aug'17
Still together