Same issue on mind since October

Back in October my pretend brother stopped talking to me and wouldn't have anything to do my family . This was all because of what someone else said I did and he wouldn't listen to my side of the story. 

My husband made a bit of Lee way with him last month by meeting up with him. He said that it wasn't just because of that but also because of something else that he wouldn't say.

Only thing I can think of is that the day I got mw diagnosis in March I texted not just him but others saying "I am am autistic mother with an autistic child" which his fiance thinks is emotional manipulation. It wasn't. I was stating a fact. 

This whole thing goes round and round in my head most days as I don't know how I can ever make this right.

I just don't know what to do .