<human>: Can you give me a shortened version of the text?

So I'm a fairly small girl. He happened to mention that he dated someone my height, + quite a few pounds and was very into it. I AM A SMALL GIRL. He said that if I lost a few pounds, he wouldn't break up with me, "but..." And I know if I lost any significant amount I'd be underweight, though I've definitely ended up at smaller weights in the past. I told him I don't want to gain weight, but I'm at a very healthy weight right now (just below 20 BMI), and I don't like the feeling of being very heavy; I'm a dancer, so it feels easier and more fun for me to move a smaller body. Also, he's basically a fitness model, so I was totally surprised that he was into bigger girls, or that I was on the smaller range of acceptable for him (though he compliments me all the time and tells me I'm the hottest girl he's been with in his opinion).
<bot>: bf says he likes bigger girls and wouldn't be into me at a smaller weight; I am more likely to lose a few pounds than gain a massive amount... What to do?