L.J.
Please do NOT stress about this! The best "mom" advice my mother ever gave me was when I was in the same boat with my 3-yr-old son. She said, "How many 5 year olds do you know that are not potty trained? How many 4 year olds for that matter? They ALL get there eventually and the less you push them, the faster they'll get there!" She was sooo right about that. When you tell him it's up to him when he wants to be a big boy and wear big boy pants and go to school, and then leave it alone, one day he will just be potty trained! No stress, no fuss! I did that with both my girls and it was so much easier...on me!