I've always thought that we had no inherent meaning, but we could give our lives meaning. I've always thought it was absurd to think that you could find any meaning to the world, to the sky, to anything. I'm not trying to sound depressing, and I sure do hope I don't. I've felt like asking yourself "why" was pointless, but instead you should ask "how?" as in, "How can I give my life meaning?"
As we "came around" the Earth by pure evolution, there is only one sensible way to solve this dilemma: Each individual would better find himself a goal to pursue, otherwise he would just end up an empty shell. Live for the sake of breathing? Nnnnnnope. Also, reproduction, or even death, is no answer to the "purpose of humanity".