Calling him out will make him defensive and your message will be lost.

This is a good time to deploy emotional intelligence and frame the conversation in terms of you asking for his help, rather than him being a fuckup and fixing his problems. Use phrases like "I don't know where we started drifting apart, but I realized that I miss _____ and I wish we still _____" and make yourself available. Create an opportunity for him to seize, not an ultimatum to resent.