how much freedom should i get and is it me or my mom ???

im 12 years old and im a girl my mom doesnt let me do ANYTHING! but she let my sister do things i cant do at my age.! i cleen everything but my room and i yell at her the least out of me my bro and sis.! What do you think i should be aloud to do.? also she is always comparing me to my bro and sis kayleigh never did this kris never did that but i talked to my grama and they did things like i did but worse. SHE THINKS I NEEDA GO ON A CRAZY PILL.!!!!! MEE!!! she is the one who belongs on the crazy pill. i was talkin to my grama too and she said that she doesnt understand what my mom turned into now a days . yeah my mom has lupis and not much money but all she does all day unles shes at work is lay on the gay couch and watch t.v. i liked it better when we had no cable but then again all she did was smoke then... now she does both.
i feel like she dont love me and ahh

also my sister does drugs and my bro steels from my moms pockabook and ive never done anything bad and im the bad one apperently ??!?! is it just me or is it my mom