Which One to Attend?

R is getting maried tomorrow. He didn't invite many people from our group as he doesn't know them well. He only invited 4 of us but 3 others can't make it. I could go, but then I prefer to go with someone, or else like a foolish fella sitting alone. So 3 weeks ago, I have asked E to come along with me and he agreed. But today, he called me and informed that he was asked by his girlfriend and her parents to join them to visit a temple in Banting. He has already told the gf about the wedding dinner. He asked me which one he should go. What would you choose - to go with your girlfriend or go for the wedding dinner?