Why is there any reason to believe that there is, or should be, a meaning to life? I'm not here for any reason, and nothing happens for any cosmically-ordained reason. I'm simply here, the random biochemical result of two particular people getting together 71 years ago.
The meaning of life is precisely what each person chooses, or has the ability, to make of it. My morals and drive for meaning stem from recognizing that there are lots of other people here who are entitled to the same basic needs and pleasures that I am, and also that I might know some things that would be useful or interesting to other people. So I try to make other peoples' lives easier or more pleasant on a regular basis through volunteering, charitable donations, writing, helping, and thoughtful kindness. That's plenty for me, and I hope it contributes a little bit to the common good.
I don't need a god or a massive rule book. I don't need the threat of eternal punishment for some rule violation. I don't need to spread "the word" to anyone else. The Golden Rule goes a long way. When I die, I will simply cease to exist except as memories and any lingering works I leave behind. That doesn't bother me at all.
You can color me a happy and moral atheist.