My (ex) boyfriend has been giving me the silent treatment for 6 months, would this be considered a breakup at this point?

Long story short, I live with him and his family and he has completely ignored me since October of last year. This has triggered my fight or flight so I've been avoiding his family for months. I am hoping to move out this month but I'm thinking of not formally breaking up with him because what makes a relationship is healthy communication and understanding. And since this has not happened in the last 6 months, can I consider this a breakup? I'm shaking just typing this so any advice would help. Thanks!

EDIT: I put 'ex' in the title because I consider him as one at this point. ANOTHER EDIT: I'm moving out tomorrow!!