Parents and dating? how to tell?

I have been dating a Guy for a while now I am white and he is black I have been keeping it a secret for as long as I could sneaking out to be with him and everything ...I would just tell them but the problem is they are sort of racist my dad more than my mom so any ideas for me to tell them ...I don't care if they have a problem with it im still going to see him I just want them to know so I don't have to hide it anymore....so any ideas?