My husband's sister told me about the conversation that they had. He insisted that he cares about me very, very much and still loves me as a person. He knows he's hurting me to an unbearable level. But he feels that this is the best thing to do right now. He feels as if we're young enough to go our separate ways and still be able to have a life at some point. He thinks I'm a wonderful person, but he wants the best for me. I don't think this makes sense. The best thing for me, for US is to work this out. How does he think this is rational?