There was a point when a couple of relatives I was close to died, as well as my dog that we'd had for ages as well. The worst I felt was after trying to explain that - in the way that you have to, to a kid - to my little brother (who is Autistic) that the dog (that he'd known all his life up until that point) wasn't going to be coming back. I managed to get through the chat with him about it without crying, but my god I was like a tap when I was alone in my room afterwards, as it all hit me like a truck that these relatives and my dog were just gone, never to come back.
Besides that, I've had a happy life. Obviously, like everyone else I have bad days, but they tend to be outweighed by the good.