Crazy as it sounds, I think the key to a long term friendship is not speaking/hanging out 𝘦𝘷𝘦𝘳𝘺 𝘥𝘢𝘺. It minimizes room to gossip, argue, or be placed in weird situations that typically ruin good friendships. "Miss you, let's have lunch" is enough for me 3/4x a year.