They're going through a hard time. As someone who understands the need to isolate myself time to time...I would say I understand and I will be there when they are ready to return.

Including you? Good luck,wish you the best, hope you find what you need. They may need space to clear their mind, probably has nothing to do with you. Or maybe everything to do with you. Give them their space.

Um...thats me... they seem like they want to stop talking or maybe they want to see if you stop them?

Id say ok, bye. Im old. I dont have time to entertain foolishness.

Tell them to carry on.