I don't think there's anything wrong with trying!! Does he still take a bottle? I only BF my son for 6 months....but quit due to VERY sore nipples....if I had knows what I know now, I never would have quit....I would definately try to get him to the breast...maybe try when he gets sleepy, to try to comfort him....I've never BF an "older" child, but I would definately not give up.....give it a good try at least!! Good luck!!
Jenn