Prove it.
I don't have any proof. I can't figure it out, so at least for now life is meaningless for me. Only the biological, instinctual urges programmed in my brain prevents me from killing myself. I can tell you why I feel this way, but doing so would lead this thread off-topic.
But still, religion is too optimistic, assuming that there is a benevolent entity watching over us. Humans are nothing but another species of animals, so why should we get special attention?
I actually think very similar to you...
It's like a sudden realization:
Nothing really matters.
We're not special, we just decide that we are.
Everything that we think and decide to do is a pre-programmed function of the brain, meaning that free will is really just an illusion.
But the way back into normality from that negative thinking can be through simple hard logic, which you said you wanted, right?
Compared to everything, nothing really matters.
If nothing really matters, then the fact that nothing really matters does not matter.
If everything not mattering does not matter, than it means we can do stuff without caring whether it matters or not.
If we don't care whether something really matters or not, we can avoid the subject and carry on normally.
Since we can carry on normally, If we are normally doing things that we can enjoy, then it is ok to enjoy them.
There BloodShadow, another reason not to kill yourself =O
More on topic, I consider myself non-religious.
I'm not an atheist though.
Put it this way, it;s not that I don't believe in God, I just don't believe in Religion.
But that's just me.