Should I go to prom tomorrow?

It's my prom tomorrow and I really do NOT want to go. I bought a plus one ticket, but I don't have a date. I don't know how I'm getting there and everyone has organised getting ready together and left me out, so I'll have to arrive alone. Everyone will be in their little cliques and I've been put on a table with the most horrible girls in school. On top of that, I've been having really bad family and personal problems and I'm in a really terrible place right now. I'd love to just not turn up but I've paid for 2 tickets and a dress and people will say things behind my back if I don't turn up. What do I do?