5 month old sleep troubles

I am looking for advice my 5 month old is still waking every 2 hours at night to eat. We follow a bedtime routine and put him in his crib awake so he can fall asleep on his own and he does great with this. He is then up every 2 hours. I will try to give his paci or let him fuss but he typically wont sleep till he eats. Our dr said he is just a night eater since he only eats for a few minutes every 2.5 hours during the day, I have tried increasing day feeds he wont have it. He slept from 7 to 1am consistently from 1 to 3 months so I know he can sleep longer. Any suggestions? We are trying to wait on food till 6 months... help! 😴