Heya! Detox can be dangerous. Everyone is different so we all have different experiences with the process. There are people who do it at home alone and come out okay, but there are a disturbingly high number of people who experience something life threatening and extremely frightening like a seizure or stroke (myself included) while detoxing unassisted. People even die from it sometimes. It's good that you are making the decision to get healthy and stop drinking, so why don't you start off on the right foot and detox properly with a Dr's assistance?
Your roomie... their opinion doesn't really matter right now. They will probably continue to give you crap until you're able to detox, but don't let that stop you from being safe. Also, I'm not sure where you live but remember there is a 24/7 detox available - the ER or urgent care. Go there if you need to. Keep us posted.