Emotional blackmail by a friend?

today i realized that i am being emotionally blackmailed by one of my friends who is also one of my teachers. because i have anxiety mental illness issues she believes that she can help me and basically fix me. if i do not do what she thinks is good for me (because i find it too hard) she will give me the cold shoulder, saying that she will give up on me and no-one will want to help me and everyone will just give up and that i can just stay in my shell forever . today i got angry with her, and gave her the cold shoulder for once for treating me badly because im sick of the emotional pain ( she knew i was upset and she thought it was funny so she said that im just sitting there sulking and shes shes sorry for treating me harshly but she said this with a smirk on her face) during break she said ohh lets make up but really i think well what sort of person is she if she blackmails me do i really want her a s a friend.... now i'm embarred to face her again what can i do ?