First of all, sending lots of hugs and support your way. Secondly, the only thing I'd say is figure out for sure what's happening with your partner. Talk things out and make sure you're on the same page. If things really are over and you really do have to move, then I think you should let your clients know right away because they'll have to figure out if they can still make it to your new location, wherever that may be. If you don't have to move, then it's not as important to keep them in the loop since it's your personal life. If they are used to seeing your partner around, then you could give them a heads up that they won't be seeing him any more. That's all that comes to mind right now. All the best.