3 weeks old

Exclusively breastfeeding he wants to eat the entire time hes awake until he spits up.  He's  definitely taking in more than what his stomach can hold but if he's not feeding he's screaming to eat and rooting the entire time... Everyone keeps telling me he's hungry but it just can't be he eats a lot.. Anyone else having this problem.  I'm assuming it's more of a comfort nurse but I feel terrible that he keeps spitting up and then I feel terrible that he's screaming