Yeah, I know it’s frustrating and it hurts, but sometimes people aren’t as invested as we’d like them to be, no matter how long we’ve known them. He might’ve had a lot going on that you didn’t know about that he didn’t feel like sharing that sort of made him less capable of dealing with other people’s issues. Or he could just be a jerk who doesn’t care about anyone but himself. There are plenty of those in the world, too. Either way, it sounds like it wasn’t a good friendship for you, so it would probably be better to just leave that guy in the past.