He was your friend—your best friend, actually. You had known Robin since diapers. The idea of you both not being friends anymore seemed impossible. He did have a best friend he hanged out with more named Finney

Then he started to become more and more distant than ever before. You knew why. It was bc Finney and his group have been begging him to hang out with them. It wasn't a bad thing tho, those were his friends.

Unfortunately, after you had confronted him, things didn't change one bit, and it didn't go as well as you expected it to. Now, you weren't on terms and ignored each other when passing.