My son would want to feed every hour and would fall asleep during feeds. The advice from the midwives in hospital was to keep him awake by gently stroking him - anywhere but his face because this can interfere with their sucking. I used to tickle his feet to keep him awake

They also said to change the diaper when you are done on one side to wake the baby up then continue on the other side.
For wanting to feel every hour, the Mütter & Väter beratung said that he should be feeding every three hours and recommended a dummy to satisfy the sucking earge until the next feed. This worked great and we had no dummy addiction - he spat it out at about 6 months and didn't want it again.
Good luck, and get plenty to rest while the baby sleeps.