T.W.
Get "Potty Training in a Day". I did it with both my boys and the first one was potty trained in a 1/2 day at 2 years 1 month and the second boy potty trained in 1 full day at 2 years 6 months. I promise you this book works and neither one of them ever had an accident and I never had to ask them if they had to go potty after they were trained. It was awesome.
I now have my daughter to train and expect to use the book again. Why miss out on a good thing.
Good luck!
P.S. I forgot to mention that my second boy was totally stubborn about the toilet like your boy and this book worked.