Responsibilities?

On a rant & rave this morning...sorry!
BRRR! It's freezing in here because once again I've let us run out of propane!  The shower was like sleet this morning and we are all huddled in blankets.  It never used to be my job to check on the propane supply (or the oil in the autos either!)  But all jobs eventually slide to me.  If there is trash to be picked up, animals fed, maintenance or repairs performed, it's my job.  If there are phone calls to make, bills to pay, decisions to make or transportation to be done, I do it all.  If my son is off it is my job to entertain him, it's my job to arrange financial miracles and its my job to insure the house is clean, the laundry done & we are all where we are supposed to be when we are supposed to be there. And God forbid I can't finish the jobs or arrange all the financial miracles, then once again the blame is mine as well.  I can and do delegate some jobs, but they always seem to be done as a "favor" to me and no one really assumes that responsibility. Why is that? I appreciate the times the dishes are done or the floors swept, but when does it become someone elses responsibility, not mine? When did everything become MY responsibility?  
I have come to the conclusion that this too must change.   The sooner the better. Muhaha!