My parents hate my boyfriend

Ive been dating this guy for over a year now. Before him I had another boyfriend, who my parents absolutely loved, I broke up with him to be with this new guy and ever since my parents found out they have hated his guts without ever meeting him. A lot of stuff has happened and then they found out we were having sex.. I’m 16 and he just turned 18, so they made us break up and threatened to call the police to put him in jail. We are still dating but completely hidden so my parents don’t find out. We have all these plans to move away together and go to colleges near each other and I am in no way changing my life for him but I know we have a future together. My mom keeps asking me if I’ve been liking anyone else and I just want to cry everytime she does because it sucks having to hide that I’m completely head over heels for this guy she absolutely hates. Anyone else relate? Any advice?