My bestie just told me she got trichomoniasis. She stepped out on her man I wanted to tell him but she doesn't want me too.

Her man is my bestfriend they met through me he would kill me if he knew I knew n I didn't tell him

Her n her man just had sex last night

Should I say something or stay out of it.

Update... I forgot to mention I live with her we are roommates.

Thank you Everyone for your comments

I am going to tell him I just gotta be gentle because he's currently at a funeral his grandmother, dad and aunt all passed away last week