The bewildered question Richard's look shoots at Fletcher is Why do you care? Fletch barely knows him. Richard's been awful to him. They annoy each other. He hasn't bothered putting on that facade of chumminess he does with everyone. There's been no point. Not on the island, and especially not here. Why does he have to be friends with people here? Why can't he go back home? Why is he here?

“Why don't you leave me alone?” is what he actually asks Fletcher, his voice cracking and angry and desperate. “Just go away! Go bother somebody else!”