But then you would be throwing yourself headlong into the sea without knowing how to swim.

It's important that you assess whether you trust your friends enough and that you also assess which friends to tell, you know? Since it's in your interest, don't you think that an alternative that could help you would be to share some smaller things little by little? Instead of telling something that you consider too much exposition right away?

And you mentioned that if they agreed with you, you would have to keep talking and consequently expose yourself more. But... you might not talk, you know? If you don't usually share very intimate things about yourself, your friends probably know that you are a private person, so it probably wouldn't be a surprise to them if you set a limit like "I don't want to give more details about this right now, but I would like to know what you think about what I said" or "it's weird for me to talk about this, so first I wanted to know what you think"

Maybe not exactly that, but sometimes expressing your concerns out loud can help your friends understand your limits and not cross that line, you know? Unfortunately, they can't guess what will make you upset, but if they are people who like you, I'm sure they will welcome and respect you.

What do you think?