I Am Scared

Ah so you had an amygdala hijack! You and your dad had a fight and he made a threat that spoke to your most primitive responses. Give it some deeper thought. So what if he throws you out? It's not like he's got access to your bank account and is withholding your money or denying you your id documents. If he kicks you out it will be hard but you can cope. You can stay overnight with your bf and in the morning the two of you can find another place you can stay; student accommodation maybe or a lodger's room. It's not going to be forever.
Even more than that now you can begin to plan to get out from under your dad's thumb. Keep an eye out for alternative accommodation. Pare down your belongings so that you have your most valuable stuff ready to go. And then when you are ready tell your dad to get stuffed. Too many people still sell this concept that your family is everything and you can't survive without them. Bullshit! I got news for you, you get past a certain age YOU can decide who gets to be in your family and who gets to piss off. You can create an alternative family, don't let anyone tell you otherwise. You are tough. You just don't know it yet.