Cindy, you don't need to protect her friends. They're adults, that's their job. They work in or near mental health. They've seen more of us than most people, not because more of us are Ill, but because, once it's known that you're mentally ill, you tend not to care what other things people know about you.
You do need to protect your wife, IF that's what she wishes. You say she doesn't know what makes her apprehensive, but you can remind her that you're there for her every step of the way. She's a strong woman, your stories have told us that. She only really seems to need you not people she left behind years ago.
You need to protect yourself, but you never seem to fear stepping in, proudly, and saying "I'm Cindy, and if that's too much for you p*** off!" Your stories have told us that too.
If it were me, I would go.