Hi. :)
From the sufferer side, full stress cup.
As in isolating becomes necessary for own health and getting stress down to manageable.
There's a thread on here titled What are they thinking? That explains why we the sufferers do that, and many other things, worth checking out. :)
From the supporter side - Ya. The silence can be a little bit maddening.
Can you talk about it being on your mind with your partner?
As you are absolutely within rights to communication about it - and to look out for your needs - and to be uncomfortable. Even if isolation is normal, doesn't mean you have to put up with it or can't change the rules if it's something upsetting you - or if isolation isn't the only issue that's going on, even in the isolating-times... but how he goes about it and other things are more problematic.