I need some serious advice about my father. Please help.

Me

My dad has been more touchy after I got with my half Hispanic boyfriend. He’s extremely racist for unknown reasons and won’t get over it. In fact when he found out, he disowned my for over a month and then apologized and accepted me again. I know I should have told him instead of him finding out through other people but I was scared. And if you met him, you would understand he is a scary guy. I’ve been with my SO for over a year and for the holidays I’ve been invited to go with him and his mom to a water park in Ohio. (We live in Michigan). I’m sixteen and my mom has already said I can go, but I don’t know if I should ask my dad. I came to his house today to spend the holiday with him and I will go back to my moms to leave with my SO on the 25th. I’m just stuck because my dad and I used to be best buds and since last year we’ve been arguing nonstop and I just want it to end. I already said I was leaving so I could work the 26th, but I could always tell him I went to the water park some other day. Do you guys think I should tell him? This is probably a mess but I’m lost right now.