I feel guilty

I knew you were doing stuff with her boyfriend but I never said a word. You made me promise not to say anything and not it hurts so much and i feel so guilty for not telling her. But it wasn’t my story to tell…..right? idk. I think I might have lost her too. She was honestly a better friend to me than you ever were to me. She never whored around with the guys I liked and she never created drama and shit in my relationships. If I lost her because of a stupid decision that you made and still keep on making then Im honestly going to be pissed.