If it's not personal it might be easier to ignore the hurt at not being greeted and concentrate on building a new relationship from scratch. My oldest brother is 9 years older than I am and he and I are friends (now that our abusive stepmother is dead). I have found that it gets harder as one gets older, friends come and go and are at a distance so one wants to try to hang on to siblings better as they're one of the few connections left to one's youth. It feels so odd and lonely when the parents die and one is an "orphan", doesn't matter what age one is or even how "bad" one's childhood was because it was still what it was and "ours" and a confirmation of sorts of who we have become and "why". Sounds like your brother had problems too and maybe could use some more, warm, attempts at connection still/again. There might be somebody delightful buried underneath his shell that would be a boon to you too :-)