I'm sorry that you lost Reinhard. Unfortunately we cannot always see if a person is depressed or even what they're thinking about. Sure, a lot of people show it, but there are so many others that don't.

Like me, for example. You would never know a thing was wrong with me...even if you spent every day talking to me IRL. I am one of those that never takes the smile off my face, the laugh out of my mouth, or even lets anyone know how I'm really feeling. I often just put this mask out to the world. I don't want anyone to know how I really feel.

Hang in there. This is not your fault and you couldn't have known any more than he let you know.