I hear this critique against atheism a lot. That its simply a hopeless way to live one's life. Believers give this argument, not passionately, but almost desicively, as if CLEARLY a outlook they don't want for life is a wrong outlook.
Is there anything you can do to reason with such ones? I think religion tends to do this: to blind people to what they want to believe so strongly that the psychological fact that a belief is what they want quietly becomes one of the strongest proofs of it.
I find my situation with theists is like watching someone buy lottery tickets every day. Day after day, throwing money away. And finally I confront them and show all the rational as to why the odds of winning the lottery are so incredibly small, that its a waste of time. But they look at me and say "why are you being so hopeless? This ticket may very well be the winner! I'm so excited that this might be it. The start of the great tribulation is going to start with Japan. With Libya. With Egypt. With the financial crises." Its almost as if the hopefulness keeps them going and the failures only meld into the next hopeful lottery ticket, building on one another instead of logically undermining the whole misguided outlook.
Life is a wonderful thing. The end may be hopeless, but that doesn't make it wrong. Its hard to convey that to someone who NEEDS to hope for something better.