Why does my mother say this its so annoying ?

Well i have been recovering from anorexia for 2 years now.And still feel cut off from the world ! i still have that voice that i cont move from my head its like it tells me no one wants you don't go out stuff like that.I said to my mother next year im starting fresh im changing every thing to be happy like i was im only 19 and haven't had a life! She says year me to i don't have a life.Im like what you have kids you have had fun im only young its like she only cares about here self. It really annoys me makes me angry and i end up saying 'look im f*cking 19 you have lived your life' Why does she go on like this shes 41 ?