My LO gets hungry easily after breastfeeding him. Not sure if it's because my breastmilk is too diluted.

How old is your little one? It could be that he is going through a growth spurt or if he is a newborn, it is common for him to wake up every 1-3 hours for feeding as his stomach is still small. Take care of yourself and have a balanced diet with plenty of fluid and as much rest as you can get. :)