Celebration

I turn 18 in a week and I haven't been able to make a plan to celebrate it although I've been thinking about it for so long. I can't invite any friends; I just have my boyfriend and my family.

My father can't stand my mother's family, so I can't make them get together. So it would be my father + my mother + my sister + my boyfriend (who is not 18 yet) + me.

Any ideas? It is really sad having no one else.