Is it irrational to think that if I tell someone things about me, that they'll tell someone else?

I don't know if it's irrational or real.

I'm not trying to share anything crazy.

But sometimes, the " why are you the way you are" question will come up from people.

Some of the people mean no harm and are genuinely curious and I know it.

Even still, I feel that I can't inform them or share with them because they might tell someone whom I [i] don't[/i] want to know ( people who might try to manipulate me with their newfound information),

or that they will lose interest.

Why do I care what they think you might ask?

Because certain people have cared enough to inquire about my actions, or lack of sharing/ getting close with them