Many people believe the ability to choose A over B is free will, and to not have free will means one can not choose A over B. However, the ability to choose A over B is not evidence of free will. It is only evidence of will (a desire to choose one over the other). And the opposite of free will is not “no will” but rather, “not-free will”, or subjected will.
Even though you actively chose A over B, there is a reason you chose A over B, and if you trace that reason back to its point of origin, you will discover different sorts of forces acted upon you which you had no control of. To have true free will, you would have to be under no influence of anything whatsoever when making any decision. That condition is probably impossible.
Your will is subject to your desires, and your desires are subject to your nature. Even God has a nature which He can not violate.
Related reading: Subjected Will