So just a little background before I get into what I'm actually wanting to say...

My boyfriend broke up with me for another girl then broke up with her came back with me, then fucked me over again and then went with another girl.

The first girl he left me for, he compared my personality and body to her and to be honest at that point in time it didn't bother me. Then the second time he compared my body to another girl saying she has "30 G's" and her legs are better than mine. Honestly its all getting me down. I feel so self conscious, especially about the size of my boobs because I have quite small ones 32A and it's all making me feel so shit about my body. Two days ago I did an ab workout and then yesterday I did a leg/bum workout.

I don't understand why he's trying to make me feel so shit and down about myself. He knows ive had an eating disorder in the past and it's so unfair. He used to compliment my body all of the time saying it was so perfect to him and he loved every part of it but as soon as he's left he just wants to be horrible and pick out all of my flaws. What do I do?