Can best friends be against your choices?

When my mom was alive, my family and even my best friend were against me living with my mother. She abandoned us to have her own life but she chose drug over us. After she got cleaned up, she left us. I refuses to believe that she abandoned us. My brothers want nothing to do with mom and told me it was a stupid idea to want to live with my mom and she would just leave again. I wanted to live with her when I was 16. Even my best friend was like, "Why do you wanna stay with a drug addict woman that made it clear she doesn't want you? She is just going to hurt you again so why bother considering it?" In a blunt, direct tone. I thought she would be in my side. Disappointing. I wouldn't say anything. I was hurt by her answer. My mom died five months ago over drug overdose and not a lot of people are sad or have sympathy towards her. Not even my bestie.