My mom has cancer, don't know what to do...

February 1st, my mom was diagnosed with abdominal carcinoma, which at that point had spread to her esophagus, stomach, and colon. She had been sick for 5 months before the diagnosis, not being able to keep down any food and ended up losing about 35 lbs. Her cancer is tumorless (probably microscopic) and the original estimate was 4 months, a year if the chemo worked. The following Monday, the doctors told her she'd get as much as a few years and there was a 5% chance she'd beat it. I was ecstatic. Today was supposed to be her first round of chemo. After doing many hours of tests, they've decided she is too sick to do chemo and it would probably shorten her life to a couple weeks. Right now the estimation is 6-8 weeks. I am crushed. My mom is my best friend and was my only friend through several hard moves in highschool. She was always in my corner and I love her to bitx. I'm not even sure if I'll be able to be happy again after she's gone. She means so much to me. I'm currently 20 years old and in the spring semester of my sophomore year in college in SC. My mom and family are in Maryland. I have a wonderful support group at school and I'm afraid to see her go like this. At school, I have tons of distractions. At home, I don't really know anyone in the area and I'd just be stuck watching her waste away. I'm not sure if I can handle watching her die. But she is my mother and I adore her. I want to be there for her. Anyone have any advice on what I should do?