Parents hate my boyfriend

So I am 15 and please don’t roll your eyes when you see that thinking that I’m just another dumb teen. I am 15 and my feelings and emotions are just as real as any of yours. Now that that’s out of the way I really need help. So awhile back me and this guy smoked some pot and my parents found out. Well I really like him and he likes me so we started dating. My parents though hate him bc he supplied said pot. My dad said “if I ever see him I don’t care if I go to jail or prison I will knock his head clean off his shoulders” I brought up to my mom tonight that I wanted to spend time with this guy that makes me so happy and I am falling in love with(yes I know I’m 15 and “don’t know what Love is yet” but I’m a teenager let me have this) anyway she was saying that she wouldn’t allow it and wouldn’t go against my dad even though they’re divorced. I then called my dad to talk to him about it and he said the same thing as before but then was calling him a loser and a pot head that won’t go anywhere in life. Him saying that really hurt me bc he wouldn’t even give him a chance. This guy let’s call him Bob in this said that he’d be willing to stop smoking pot id it meant my fathers approval so I mentioned that to my dad and he said how he was a cop for 16 years and all pot heads are the same and never change. He said he is never letting me see him ever and that’s going to drive us apart. I just don’t know what to do anymore. This guy really truly does make me happy and is a really good guy.