Family Issues...Big Time...Any Ideas?

This has been going on for quite sometime and it’s simply just getting annoying and hurtful now. My ex boyfriend lives with me he’s my bestfriend and he pays rent to my mom but my mom says we cant tell my dad about the rent becuase it’s the only money she gets and if we tell my dad she will kick him out but my dad makes him do everything around the house because he thinks he’s pretty much a freeloader. my parents and other family members always go out and leave us two at home to do nothing…and we always have to make sure the house is clean like no dishes, headges cut, floors mopped, garbage taken out. I cant handle this anymore all they do is complain, dont spend time with us unless we have money or smokes or things like that…we give them smokes generously but when we dont have any we always get introuble for asking for one from them. What can we do? I’v tried talking back but that doesnt help…and my sisters boyfriend lives here for free they get the whole basement and dont have to do any work or pay rent and they get worshiped pretty much. my older sisters boyfriend use to live here aswell rent free and work free…Why do they treat us like this? how can I talk to them? What should I do? any help please even if it’s just moral support, I feel like they hate me, and using me and my friend feels the same…out of 560 a month he gets he only gets to keep 60 dollars.