TELLING PARENTS ABOUT OLDER GUY

Okay so I've been talking to this boy. He's really nice and we really hit it off but he's 19 and I'm 16. And to make matters worse he's turning 20 next month. He's the only person I've crushed on in years and I don't want my parents to hate him or me. They've never wanted me to date in general and I have no idea how they'll react to me liking someone who's 3 and a half years older than me. Please help!!!