Well personally I'm quite happy with my life. For my helping other live better lives* is meaningful(but if everyone had same purpose it would be uncomfortably circular).
I found it interesting that ChrisNorstrom can be happy when he reminds himself that he does not matter. Either I misunderstood something or there is a way to be happy even about that.
*happier/longer/leading to total higher number of happy people in the future etc(Although obviously my success in this goals is very limited)
Well even though I agree that what we do is "worthless, useless, meaningless, purposeless" in universe scale it does not make me happy. I can be happy by thinking for example that universe defaults to not-existence (since most of it is empty/dead/not alive) and I'm lucky enough to experience life(even for short time), but I'm rather being happy despite worthlessness of my life rather than thanks to it. Could you explain your thought process that led do you to happiness from being meaningless?
*happier/longer/leading to total higher number of happy people in the future etc(Although obviously my success in this goals is very limited)