What should I know about dating a Muslim guy (as a western non-practicing Christian)?

I met this guy and he's heads over heels for me. We're moving a bit too fast for my liking when it comes to this whole feelings thing, but I'm giving it a try. He's Muslim but he drinks/isn't a virgin, though he seems very serious about everything else. I wish to know what you (even better if you are a Muslim or has dated one) thinks I should know now, before I get in a relationship with him and get shocked/surprised or end up disrespecting him for some reason.

What should I know about dating a Muslim guy (as a western non-practicing Christian)?
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