Sorry, it sucks but the reality is, you can’t afford BU. If your Efc is 0, your options are limited. You could go to community college and transfer. A low cost local university, live at home, federal student loan and working could be do-able. There are schools that meet full demonstrated need but they are few and highly competitive. Enough Merit aid is also very competitive.
You are making multiple posts because you are hoping for some sort of miracle that makes BU possible and I feel for you but you just can’t afford BU. My kids couldn’t either and when I was applying to college almost 30 years ago, my family couldn’t afford it either. It’s an expensive school that doesn’t promise not is capable of totally funding every low to middle income student they accept.