88% done with War and Peace

I never thought about how complex the relationship between the Rostov’s and Denisov was until now with the death of Petya. He almost irresponsibly got the boy killed with Dolokhov (and I wonder how much Dolokhov wanted to get the boy killed, though there’s nothing to suggest anything like this). Roston, like Sonia, is a fixture in the Rostov family (like a cat) and I wonder if they are comparable?