really sad right now.

So one of my besties turned on me, she was bullying my other friend so I stood up to her and told my house dean. She is saying to everyone, and by everyone I mean everyone about what happened and now people are calling me and my other friends pussies and bitches. She also said that she was never my friend but hung out with me because she felt sorry for me. This is really bringing me down because she is so confident and I am just not anymore. The bullied friend, let's call her B, had a breakdown in the middle of the field at lunch time. She collapsed and balled her eyes out. I was about to tear because I had been mean to her behind her back in the past. I'm not in a good place with my family either. With my household and cousins family there is about 1 depressed person and 2 on the verge. I feel helpless and my grandma is going in surgery soon. I'm just so worried I don't want to go to school and I don't want to go home. Please help.