My mom is trying to fight me because I won't keep feeding her bad habits and paying her bills and I want to move out I'm 18!!!

My mom has a gambling and drinking problem she wants me to pay the rent pay the light bill pay the cable then buy all the household supplies including food then whatever left she Gamble's and comes home drunk and in rage!! I am not happy here i turned 18 in September I told her I will.help pay her bills until December i gave her 180 for the light bill and she Gamble's it and I tell her I will be leaving this month which she already KNEW it's time for me to go and January 2020 is legit right around the corner and she's trying to fight me and tell me if I don't give her nothing she will take it and tell social security incourageable because it's still in her name and I have to give my landlord rent this week to start moving in and I will only have 150 for myself until 2 weeks when I get paid is she legally allowed to take the money and keep using me for the money so I won't be able to get my own place it's very toxic here I'mnot happy for comfortable..