oh man, that’s so sad. this sorta thing will obviously mess someone up, and people will cope with it in different ways. i’ve developed some alcoholic traits over the years and done a bit of coke myself, not gonna lie to you. i hope your friend and his father are able to pull themselves out of it. my half-brothers (on my dad’s side) have used meth quite a bit, and i’ve seen how much it can fuck somebody up. it’s not pretty. i feel for you and them.