I recommend what we do. I'm not a party person. We go to things, sometimes we like them sometimes we don't. We find that if we don't go to something we regret it, and that's a lot worse feeling than if you tried it out, because you have to also listen to all the people who said what a great time they had and why no earth didn't you go? (The explaining is a big headache in itself.)
Go because of the person you love there. If you are having a bad time, but you won't necessarily, you can easily make a reason to leave (such as sudden headache, feeling a bit unwell, pet problem). I find things are never as bad as I imagine them to be beforehand. Who knows, you might have a really good time and the food might be worth having, if nothing else !!!