Why cant they understand?

One of my friends greta is sometimes nice to me and now she yells at me and uses a Hurtful tone of voice and she doesnt txt me like she used to. And another friend of mine named amanda used to hang out with me and now whenever i say something she just stares at me like im the stupidiest person on the earth it hurts so much! Why cant they understand that there hurting me?!?!