Big confession

So my ex / baby’s father cheated on me with a bigger white girl (who knew about me ) . Ever since then I get really upset when I see one . I’m the complete opposite of that . I’m a black skinny short girl . He told me when we were dating that I should I always try and maintain my size bc he likes it , so I did . And then to come to find out he was cheating on me with a girl who didn’t care about her body at all not saying all big girls don’t take care of their bodies she but she didn’t all she eats is junk food . I know I shouldn’t feel this way towards every big white girl but I do I really hate that I do but I just get this horrible anxiety.she