My friend in NZ just lost his son to suicide. He was loving, supportive, and present at every step, and I'm certain he was appreciated. Sometimes that's all we can do.
That said, I've lost "friends" every single time I've been open about my struggles. Every single fucking time. Now I never ever discuss it anymore. Don't abandon your struggling friends when they're not "fun" for you. Life is hard enough without adding cruelty.