Sounds like you need some solitude and space.

Ask your husband for some time alone each day. Write on a piece of paper and when you are done, get rid of it. It is the act of getting out thoughts that is therapeutic, not reading what you wrote.

My wife and I know each other's phone password, but we don't check them. Any time we get a text when we are together, we just simply tell each other who it is and what's it about.

You deserve some privacy. Anyone that doesn't respect that does not warrant respect back.

Maybe you should turn the tables and check his phone.