[stelles]

Sounds exactly like my dad! I would tell him about your boyfriend. He'll probably handle it better than you'd think. Just tell him that there's a guy who you hang out with a lot and were planning on meeting at the dance. If your dad says you can't go, point out that there'll be teachers there to supervise, and that you're responsible enough (and old enough) to spend a night at a school dance with a guy.

If for some reason you don't tell your dad about your boyfriend, just tell him there'll be a lot of teachers there. Also, ask him what he's worried about. If your dad is still going and he doesn't know about your boyfriend, warn your boyfriend before the dance that your dad's going to be there and he doesn't do well with you talking to guys. Hopefully he'll understand and just act like a friend for a night. Good luck!