How do i tell my parents my boyfriend is someone they HATE?

Just because you're legally 18 doesn't mean you should destroy your relation ship with your parents. Explain to them that you both have matured and let them calmy know that your previous breakup was a misunderstanding. Tell then you don't want to go against thier wishes, but you are going to date him. If they oppose still, tell them you live them and let them know that you don't want a boy you really like to destroy 18 years old love, and walk away. But act mature, and they'll think about it, then see howhappy y'all are and it will all be better within 4 months.