How much do I breastfeed?

Rachel

This is night 2 for my baby pp, and all day today he's really only nursed every 4 hours. But when he does, he nurses for like 30+ minutes. I thought he would nurse more tonight cuz I heard night 2, they tend to cluster feed, but he doesn't act hungry when I try to feed him any closer together. I know the recommendations say 2-3 hours, but how strict are those? Do I need to be forcing food if he is not interested?