If God created our will, then he's responsible for every choice we make... So-- as I recall, the official philosophical answer is that free will doesn't exist. Only the illusion of free will, because the causes of hour behavior are so complex that we can't trace them back. If you've got one line of dominoes knocking each other down, one by one, then you can always say, look, this domino fell because that one pushed it. But when you have an infinite number of dominoes that can be traced back in an infinite number of directions, you can never find where the causal chain begins. So you think, That domino fell because it wanted to... Even if there is no such thing as free will, we have to treat each other as if there were free will in order to live together in society.
~ Orson Scott Card