Forgive the rambling .
My Male friend Bob ( a friend since childhood) has a male friend Bill who he has been very close with for a couple of years. Bill lived in Bobs family home for 2 years as he had nowhere to live.
The friendship between Bob and Bill is platonic but toxic eg:controlling behaviour akin to an abusive romantic relationship with evidence of jealousy.
A few weeks ago Bill told me he was in romantic relationship with a woman that he was hiding from Bob,i advised Bill to be honest with Bob as there is nothing wrong with that.
Bill was fearful that Bob would chuck him out if he knew about the relationship.
He said he would tell Bob in his own time and asked me to keep his confidence.
I have been close finds with Bob since childhood so this put me in a difficult position but I agreed.Other people in our friendship group also knew about Bills relationship and were sworn to secrecy too .
3 weeks later Bill left Bobs home, he stole away in the night with no explaination, later saying he was staying with a relative as he needed space.
Bob was distraught not eating, sleeping and worrying about Bill, it appeared like a breakup.Seeing Bob confused and distraught as to why Bill had just left and wouldn't return. I felt I had to tell Bob that Bill was fine and living with his new GF.
Bob went ballistic at me and is furious for not telling him the minute I found out.
I explained my reasoning but to no avail.
Bob says my disloyalty means he's done with me and our friendship is over.
Did I betray Bob ,was I disloyal, was I in the wrong ?