My moms emotionally abusive

I’m 17. My parents divorved a few years ago because of my moms controlling personality and her ability to turn anything around . Anyways . She has a boyfriend who is an alcoholic and always yells at me. She emotionally abuses him and us . She calls me fat , but when I lost 20 pounds ( and became 1 lb underweight) I was” to skinny to be loved” I’m an A-B student yet she calls me stupid and also names such as a slut or a cunt. She tells me my dad doesn’t love me and that his girlfriend calls me all sorts of names. My moms obsessive and calls my dads girlfriend every day. She has over 1000 calls in the past 3 months , that’s not a joke! I could honestly be sitting down and she could come home after a long few hours gambling at the casino and yell at me that I’m stupid and worthless and that when I cry she enjoys it and it means nothing to her . I have honestly contemplated suicide multiple times . I feel so helpless and worthless because my dad can’t say anything to her or she will take him to court and get full custody and take his parenting time away. I have no one to turn to and I fear for after I turn 18. She takes all my birthday money and my work checks and I never see a cent of it . She told me I can’t even have my debit card after I turn 18! Help please .