Free will argument

[kingofmirrors]

I was having a discussion with some religious folk the other day about whether or not free will and an all-knowing god could coexist. They argued that everyone can make their own choices, but god can see a "timeline" of all the choices you will ever make because god transcends time. I argued that if god knows what my choices are going to be I actually don't really have choices. In other words, if god sees me choosing to go to sleep in 10 minutes, I WILL choose to go to sleep in 10 minutes and I can't change that. To me, that means I'm just living out a story I've already written and therefore don't have any way of affecting my future even though superficially it appears that I do. If I'm stuck on a timeline, even one that I've written, that seems to indicate that my free will has been compromised.

The whole discussion was fairly pointless and never got resolved because the other side never really countered my argument, but I'm very aware that my argument is probably faulty and/or circular. I'd like to hear some thoughts on the issue. And sorry if the language is unclear, I'm confused just thinking about it.