For those of you that can’t leave right now and are isolated, what do you do to keep your sanity?

I’m married to a covert narc. He is not abusive in the sense of name calling or physical. He is decent as long as I am doing what he wants.
If I step out of line, I get silent treatment and passive aggressiveness.
So I’m looking for some things to help me focus on myself and hopefully make some friends so I have a support system when I leave. He makes it very hard to do either of those things.
But I’m losing my mind. I went into dissociative state while driving the other day when talking to him on the phone because I forgot to do something that was my responsibility and he was questioning me.
That was a new thing, but I have a feeling more will come.