No. Free will is being able to determine the outcome of your own future.
Believing in God means that you believe that he knows all that will be.
That means you do not believe you have an actual choice.. lol..
You're the perfect example. You think that you decide your fate, but you don't.. because you believe that some entity knows the future.. Free will is being able to choose your fate, not "believing you choose your fate." :)
RE: Why you don't believe in free will if you believe in God/Religion! You don't...