My mother is very Sad and Stress about me

Today in the early morning that , my mum talk to me that she very stress about me. She told me that she had been treating so nice and enough of me. I was very sad that she told me , she wish that i was not her daughter, and not married before. she might be very happy about this matters. when she nag nag me at that moments, i kept thinking of running away from home. but on others hands of thinking of my mind, if i left like that what she will think about me? I think she will be very hate me. I wish i can be my younger sister, she was so capable, although she not earning much, but she can manage her duties and she never let mum worry about her. That's why that mum so dotes her a lot, she deserve that mums loves her more than me. I want to be get something big, but i keep doing mistake. I wish that i can look after my mummy in my rest of the life. No matters right now is so hard and stress now, i need to stand up.. do somethings and prove to my mummy that i care about her, i will look after her for rest my entire life. I would to said to my mummy ,, I AM VERY SORRY i let you down . PLEASE FORGIVE ME ........ @_@