I can't take it anymore!

my fiancé is driving me absolutely crazy. my son in 8 weeks this Thursday. pediatrician says he's colic and he has G.E.R.D which he has medicine for that does help tremendously with the crying spells. but every time my son cries he always says "he's hungry" or "he wants you" I need a break. I want to clean my house. do laundry. and KNOW that my son will be okay with his father, I mean is it that much to ask for? My fiancé seems to be struggling with be a father.... when the baby cries, he hardly tries to soothe him, instead he gets irritated, frustrated, and either cries or gets an attitude. I have no idea what to do. I feel like leaving Him!