Those frequent night wakings are pretty common at that age, due to distracted feeding during the day. Try to get him to eat for as long as you can and do breast compressions to help keep the flow quicker for him and empty the breast.
Assess at the night feed why he is waking, is he hungry or just taking the breast because it is offered? Is he eating so much at night he isn't hungry during the day and perpetuating the cycle? Or are the wakings developmental - his legs tingling and waking him up, rolling over, kicking off the swaddle?