Friend or foe

So we are still teetering with the idea of leaving "the group" and going with a direct flight. Yes, some of our other friends that already jumped ship with no regrets but we are just too darn nice. We did however get a call from the groom and he mentioned 3 more people are going to be booking and that would give them the #s so we could leave. But in the same breath he said that if another couple that we know leave that would make them short on #s. So do we say screw it like some of our friends and let them deal with the #s or should we be good friends and suck it up?