If you are an atheist, what is the meaning of life?

I do not believe in religion. I believe Jesus was a great man, who changed the whole society and died for the future of humanity. But, I do not believe he is the son of God. He is just a smart, very brave man. Just like Nietzsche, and any other prophet.
I do not believe in the religion God, so life is the meaning I, myself put to it. If life is pointless, then why don’t we all commit suicide?