Wrong thinking of stuffs..

Its so screwed up, and the person that knows this is someone i believe i can't entrust to already, because he/ she almost spilled out this secret.

Isn't it sickening when you tell this person something, and then the next day another person knows and that person you told to denies saying anything?

no one knows, and that's good, because if someone knows, it will happen again. Don't ask me what this secret is, but i can only say its something related to me.

I won't tell anyone, even if you're very close to me or something like that...

How to seal up that person's mouth without injuring him physically or mentally..?