My friend wrote a letter to me saying why my best friend is not tlkin to her then she said that the only reason why my best friend is stuck to me is because she doesn't have any friends. I knew that my friend es about everybody even me... My best friend already knows what my friend says about her (before the letter) so I showed the letter to my best friend. Later I realized I did a wrong thing. THen I found out the my friend found out that I told my best friend everything. I know I broke her trust. I know I did the wrong thing and now I don't know what to do. I may be the reason why their friendship breaks up.

You apologize. Then it is up to them.