I was in your shoes. Had this friend whom I thought was my friend. She didn't even contact me to spend time with me, so we grew distant. We were kids and kind of grew up together through family.
I would always be over my grandmother's house whenever my aunt would go over and bring her food of what she cooked. Both of my aunt's mother (grandmother, for me) and auntie (great-auntie, for me) lived in the same apartment (no stairs, apartments for disabled elders that looked like houses at first glance). My so-called friend's grandmother lived right next to mine. I've realized that she only played with me because she was bored and couldn't go over to her friends house. Around this time, was when Tik Tok just came out (it was known as Musical.ly) and we both followed each other on there. Then, it still had Direct Messages in the app, and I had been trying to contact her through there whenever I wasn't over at my grandma's. She never replied.
In middle school, she became unreachable. I couldn't even talk to her during break time outside, because she was always surrounded by her friends. After that, she completely ignored me.