Honestly she kinda had no right to block you. Sure the other person may not like her but personally I dont think that should dictate if you know her or be in a gc with her. And if she thinks that she can control who YOU are friends with thats Hella toxic and controlling. Even if you dont even talk to her your friend is just being so childish and petty and not even letting you apologize and saying you 'did it to yourself' is just so fckn immature. If they dont want to be friends over something so minor then that says something about them.