I refuse to let my family attend my college graduation
Why don't you want your family to be there?
Not at all. I simply hate them and I don't want to be near them.
You should be proud and grateful that your family will attend the graduation. They are proud of you and want to see you on the stand.
I really don't care about them. I'm going to get so wasted after the ceremony.
Don't you still have any respect left for them? Why not just let them join in on this one very rare and special day, even if you're just faking it? I'm sure you and your family won't regret having something happy to look back to.