<human>: Can you give me a shortened version of the text?

I buy the majority of the stuff for our apartment. Once in a while 20M and 18F buy stuff for the apartment but it is rare. 21F has bought stuff maybe once or twice. 

However I do very little cleaning. I have a super busy schedule, I do my dishes, mop every other week or so, clean the stove and kitchen counter a couple times a week, and clean the bathroom counters, sink and toilet about twice a week. My roommates do a lot more cleaning then me and I know it. I have brought it up multiple times and everyone has agreed I buy (almost) everything and that they don't mind picking up my general slack cleaning wise as long as I make sure to clean up my own messes (which I do) . 

I do not want this to change. I do not have time for much sleep at all currently and do not want to give up sleep to help contribute more around the apartment, I am a full time student, work two part time jobs and am in 3 clubs, two that I hold leadership positions in.

Roommates 20M and 18F are upset that 21F doesn't contribute and that 21's Boyfriend doesn't pay rent or contribute. 

I have a feeling it will come down to everyone wanting even contributions for everything and I am not looking forward to that. 

What should I say to help keep the status quo, and to stop me from having to do a lot more chores then I already do?
<bot>: I buy all the household supplies and do not do a lot of cleaning. What can I do/say to help make my roommates want everything to stay the way it is?