Thanks for your reply. It does make sense to do nothing and not react to it. My initial reaction definitely was anger towards him – I mean honestly he is the one with the addiction and I am doing everything to keep things together for the family – I went into full martyr mode!
I think it also was because I googled the symptoms and was met with lists of side effects of paranoia – one of which is violence towards themselves and others. The fact that his suspicions are directed at me got me worried. I thought about suggesting he talks to his friend about it – like tell his friend what he said to me about finding patterns etc and that way he could see a reaction from someone who is not involved. Maybe it would help him see that this is another side effect of his drug use.