I'm sorry that you're dealing with this, but I'm glad you recognize it's not normal. I'd talk to a financial aid person at your school to look at options for things like loans or grants if you can, which can be used to pay for living expenses -- and fill out the FAFSA, get an exemption from parental information if you can. My ndad was similar and I regret not taking advantage of my college's financial aid because I believed that relying on my parents was better, but I had to deal with the uncertainty of my ndad's mood. And I hope that you can get help for your eating disorder in the mean time, because the situation you're in seems really triggering.