R.M.
Hello K.,
We all are creatures of habit. Your son should be able to sleep through the night, but he's in the habit of night feedings. When he wakes, have your husband/ partner go into your sons room and pat his back, offering comfort, but not milk. Eventually your son will realize he won't recieve milk in the middle of the night, and stay alseep. The key is for your husband/partner not to talk or engage your son, or he will see it as play time.
If you're a single Mom, elimnate the milk, offer a sip if water from a sippy cup or pats on the back, but no milk. Again, he will eventually figure it out.
If you engage, sing a song, talk to him etc, he will see it as social time & it will not work.
Good Luck,
R. Magby