Ugh relationship help....please?

So here is my situation... I am 23 years old with a ds who will be 3 years this year. I am currently with my boyfriend of 6 years. Well I got laid off when my son was about 6 months old and became a stay at home mom. I have been collecting unemployment that is only about $40 a week and just ran out so will not only be $20 a week. My BF currently is going to school full time to become a vet technician and will graduate in may of 2012. He also works part time at his medical records job that he has had since he was 17 years old. He only makes 12 dollars an hour and works 4 hours a day max so approx 20 hrs a week max. We have super cheap rent for the house we are in because its one of my bf's grandmas houses that is paid off so we only pay $400 a month plus utilities. We are very lucky dont get me wrong but I cant even afford to go back to school right now until he is finished. The problem is, He yells at me all the time and complains about the house. He says I dont have any responsibilities or anything to worry about so I should do more work in the house. Now I admit sometimes I fall behind on housework but I try. I am the one that always does the dishes, laundry, vaccuming, cleaning, taking the trash out, and everything around the house. On top of it all I really focus on my son and play with him, teach him new things and currently trying to potty train him. My BF will just leave dishes around, soda cans and trash around, laundry on the floor everywhere, I mean he doesnt do anything! I am grateful for him because he works and goes to school to try and provide for our family but I mean I have alittle side business that brings around $200-300 a month sometimes(its not like steady income) but I try. I give him space to study and I just feel so overwhelmed. He yells because he has no clean shirts and I just did laundry but he lays his clothes in different places so I cant find all of them. I am getting pissed off but wondering if I am over reacting? I dont know what to do. I dont expect him to clean too with his busy schedule but just help by putting his clothes in the hamper instead of the floor and maybe rinsing his dishes he uses at least and throwing his trash away, it would help so much and when I try and talk to him about it, he just gets super mad and yells at me. ugghhh anyone else in this situation?