I've seen a lot of sorrow over the death of Robin Williams. Mostly paired with sentiments of him bringing people joy.
Depression doesn't discriminate. Sometimes it even horribly haunts people who outwardly appear happy and bring joy to millions.
If you find yourself in such a situation, please know that it should come with no shame. No matter what shitty things our society says about mental illness, it's a legitimate medical issue and deserves to be treated as such. If you're a sufferer, please seek whatever help you need.