hard decision but i agree with telling him you wont ride with him anymore. he is putting his life at risk by choice, and your life at risk because of his ego. i understand wanting to protect him but, if your dead who protects your loved ones? we've stopped riding with certain people due to their riding habits.
this sport is too dangerous already, and to ignore a request for avalanche training, and helping you IF an emergency comes up.... unexcusable. time to find new riding partners.
i want someone who is interested in fun but, has their saftey and mine at their utmost thoughts over having fun. (a true good friend ALWAYS thinks of others before them) i want to know if i am unable to make decisions for myself that someone gets me out, and gets me to help, to save my life.
i bet you bring this matter to the persons family or better half, it gets treated different. but be prepared to lose a friend over it. i have seen big egos in action, they dont like being told they are wrong. some never change until it cost them their lives or someone elses. i dont plan on being anyones someone else.
good luck to you. ski