REALLY IMPORTANT: everyone but mom & sis treating me like i'm 7 and constantly lying & insulting me?

Well first of all, my parents friend has been staying with us for 6 months and is driving us all nuts. Ans my sister lives next door and is happily married. My grandma lives with us too. When i come in the house after a long day, or just after school, when i'm on the computer, i can't take these people talking to me like i'm a baby like,"Oh how was ur day?! AWWW! U saw that movie?! That's a pg13!!!" like today i went for a hair cut, it said 8 dollar cuts, and mine was 16, my mom doesn't get that its $8 for men... not me and so she was whining when i got home to my mom and the woman living with us(L) well my mom was wining and then she said,"And the woman said to Jessica to stop dying her hair and L said,"Such a little girl, she is only 12, trying to grow up." so i yelled from the other room ,"U all need to stop complaining!" and like always L argues with me,"U might think we r complaining but we r not!" so i said,"Any other human being would clify that as complaining" and then i told my mom that im not eating lamb spaghetti(i hate it with a pion) and she said it wasn't and i said,"YES it is!!! Stop lying to me, ur always doing this, i know what it smells like and i know what it tastes like and looks like so no!" at dinner i sat down and she had gave me some noodles without the sauce and so i was happy so she told me to eat. Then my dad walks in and says he would get some bread sticks and i said,"Is there any left over garlic bread?" and he told me,"U might have to actually get up and go see, i know that's hard for u." I was sitting at dinner and L says,"Were u hungry little girl?" i cannot stand this any more!!! I'm going to go hide in my room until i'm 18 and can move out! They all talk to me like they talk to our family members that r 7!!! What can i do??? Not to mention i caught my mom smoking today, she "Quit" 2 months ago, i had a melt down because this is the second time i got her to"quit" she lied to me. Everyone makes fun of me because she "smoked".~JESS