Why couldn't he tell me he didn't want to be friends anymore?

One of my friends that I've known since I was 18 years old I'm 27.  Decided that they no longer wanted to be friends with me.  So they ended up deleting me on social media.  I tried texting them telling them I don't know what I did wrong.. and that it hurts me that they would cut me out of their life like that, but I guess I was never their friend to begin with.  Because I feel like you don't do that to the people you care about.  They ended up blocking me on everything so I can't communicate to them at all.  They then proceeded to call the police on me telling them that I was harassing them. So I end up getting a phone call to stop harassing my friend and that they no longer wanted to talk to me or be my friend anymore.  I don't know why they couldn't have just said it to my face instead of getting the police involved.  Can you guys give me any explanations of why he would act this way?  Some of my friends think he's got a crazy girlfriend now.