My mother found out i smoked?

My mother found out that ive been smoking, and it just puts her in pain. It made me cry to. I try talking to her about how shes always working and how we never talk anymore and all that. When I was younger me and my mother were very close, ever since we moved she has to work more, we don't talk no more. So then it brought me to depression, and I started smokin weed. She found out and shes all in pain, but I try telling her about staying together as a family, but all she says is im selfish and I worry about my self to much. What should I do? I lost all her trust, im grounded. I have no friends,because I just moved. its horriable. Im thinking of just going all out and not care anymore.