super struck dad. scared to tell him about bf

Okay so I know this is going to sound crazy but I'm 22 and still live with my dad, because I've been in college and can't afford to live on my own yet. Well I've been dating this guy for almost 2 years now and have NEVER told my dad about him. Well I'm graduating on June 1st and my boyfriend wants to go so bad to watch me graduate. My dad is obviously going and I obviously want both of them to go. But my dad has always been against me dating. The last time I had a bf he refused to meet him and things got out of control when I told my dad. Now I'm terrified to tell my dad about this boyfriend. Idk how to bring it up or how to tell him. But I really truly just want my dad to meet him and be okay with this relationship. How should I go about telling my dad that he's coming to my graduation? Everyone in my family knows about my boyfriend except for my dads side of the family. What should I do? The closer the date gets the more scared I get.