((hugs)) both of mine fought bedtime, it is hard!
I know he's just three, but is it possible he is getting ready to drop the nap? DD slept fine when she didn't nap, but on days she did, even for 15 minutes, she was a nightmare to get down. She wouldn't fall asleep until 10:30 or 11! DS now at 3 1/2 is reaching the same stage I think.