I think it's bothered me so much because my ex said these things to me. I've never heard them from anyone else before.
I can totally understand why what she said has bothered you, but please look at the facts.
Nobody said anything like this to you before, apart from your abusive ex.
Abusive ex was abusive. And is now an ex. Anything upsetting that he says are fundamentally and fully untrue.
Now let's look at the sad bag of neuroses that your friends brought out to play last night.
You don't know her, right? So she's had zero time for you build up any respect for her opinions. Opinions are not facts.
She was drunk. Drunk people can be crapbags. The fact that she carried on saying things that were upsetting to you over a sustained period of time proves that she was an insensitive arsehole.
Drink also brings out people's neuroses. One way that manifests, is by putting somebody else down to make yourself feel better about your own low self esteem. That's exactly what I think she was doing - feeling shit about her own life, and in order to prop up her ego, she had to make up a story that somebody else's life was more shit than hers. Oh look, here's a captive stranger who is feeling vulnerable. Excellent, her ego says, this will do nicely.
It was her story for her benefit all along. Just like it was your ex's. Don't take it on as yours.
I am a proper plus size, and have been single for years, proper cobwebs in my knickers! I recently had the best sex I could have imagined possible, which coincided with a run of me realising and living who I really was. All my years of projecting that I'd have to find somebody who could see past my being fat and love me regardless - and I stumbled across somebody for whom my size, cellulite, scars, incontinence and stretch marks were simply totally and genuinely not involved in him finding me attractive. He just did. Like I just did him. And we found each other attractive because we were attracted to each other; bodies are SUCH a small, tiny part of the package.
Please work on loving yourself; every part of what makes you an amazing wonderful woman. It will help you to avoid ending up with another abusive partner, and it will help you to throw comments like hers in the trash without a second thought. Plus... it's really fucking fun to love yourself 