Can my boss force me to work overtime with out getting an additional lunch brake?

i work a full time job @ the American apparel but my boss is asking me to work over time, i use to pull in a lot of over time but i don’t want to any more. so now hes telling me that i have to or else hes gonna change my schedule to work overtime. then he doesnt want to give me a brake when i work overtime. can he do that?