fighting about naps....

So my son just turned two today and for the last few weeks I've been talking about he's getting so big and he's a big boy and stuff. Well most recently he has started to think he is to old for naps becuase he is a big boy.. so obviously this is pretty much my fault. And now whenever I tell him it's nap time and stuff he throws a fit! I don't know what to do anymore! I need him on this schedule becuase I'm going into college this winter, and in my high school years his Nap times were my study times. And let's be real no one wants a grumpy two year old running around.. I help on how to reverse my wrong doings and get him to Nap! What had worked for you lady's??