Emotionally Abusive Mom

Has anyone else had to deal with an emotionally abusive mom? If so, how did you cope? Because my mom calls me everything ranging from fat to a girl who, when it comes to guys, "likes what she can get". I have only had one boyfriend my entire life (I'm 18), but every time a guy even so looks in my direction she has to outshine me so she can get noticed. The other day she told me that nobody wants to see my fat thighs and that I need to lose weight. When I confront her about it, she pretends like she didn't say anything and like I shouldn't give a damn about what anyone says. But, she's my mom, you know? Anyway, she's always trying to outdo me in everything and I personally think she sees me as competition (if that makes sense)... But, if you've had to deal with this, how did you cope? Because I don't want to hate her, but I'm truly starting to.