IF Justin dragged it out that long then that means he made a mistake. It doesn't make him a shitty human being. But we don't know when Justin made up his mind because we aren't Justin. Lance isn't Justin. I seriously doubt Justin, who is apparently too cowardly to tell the group he wasn't coming back, suddenly became brave enough to say, "Not only am I not coming back, but I knew it all along and I just dragged you along for kicks."