You don't need to believe in God to have meaning in your life. You don't need God to have beliefs either. I make no judgments on people on whether they believe in God or not. Some of the best people I have ever met have been very religious or very atheist.
Joan of Arc, for example, was the most influential people (not just a woman) of her day in my belief, despite her short life, despite her "alleged" delusions - and she was truly devoted to God, and she changed the course of European history, single-handedly.
Stephen J. Gould, in my opinion, was one of the most influential scientists of his day, and much of what we understand about evolution of life on this planet can be attributed to his ideas. And he was a devout atheist.
So what in both cases - I don't care what or who they believed in - I look more at what they contributed to the world.
Some of the most ridiculous and wasteful debates I have ever seen are those that argue about whether God exists or not. Either God does exist, or God does not exist, and no amount of debating is ever going to change the facts.
As for the pointless thing, even with or without God, life can seem pretty pointless depending on what ways you look at it. Wish I could give you a way to deal with the pointlessness you are seeing, but alas, I think about that much too much myself.
Being that this is not a good day for me, I'd rather refer you to Karen's comments on that - she's a very good person to listen to.