A.J.
Hi S.-
First of all congratulations on breastfeeding your son for 8 months. You will have saved $2,400.00 by not buying formula by the time of his first birthday. As for middle of the night feedings, you have the right idea. It's just a habit. Your baby is now old enough to get all his nutrition before he goes to bed, and doesn't need a midnight snack. How to change the situation? Ask his Dad to respond to him (Daddy doesn't smell like breastmilk).
Dad can give a small cup of water for a night or two, then just decrease his contact each night and by a week he should be sleeping the night without waking.
As for the biting, one traditional strategy is when the baby bites, quickly push his face into your breast. When the baby needs to breathe, he will back away from you and stop the bite. Then relatch him. Babies will get it "if I bite Mom, she will take my breath away, so I better not bite Mom anymore."
Good luck, A. J.,MN,APN/CNS,IBCLC,FILCA