If you're platinum by March of each year, it would be smart for CO to send you a letter thanking you for your business. An actual signature by Larry for people who fly that much would be a nice touch. Maybe you should send them a letter suggesting such.
From my perspective, that's an insane amount of flying. I do 1/4 and I find it extremely disruptive to my personal and social life. How do you handle it? Do you have a job where you're gone EVERy week?