What should I do?

So my ex who I haven't accepted him as a boyfriend again yet, has this thing where he constantly feels like he needs to improve himself and then has kinda pushed it on to me. For example, he is already extremely smart but he's made an excel on calculating the percentages of information he knows on a subject, and studies to improve on this everyday. He also is going to bulk up and ate loads yesterday in order to. He said whilst he likes my body a lot, he would prefer it if I was even bigger in my boobs and bum. Therefore he suggested I eat lots more, and has mentioned it a few times. I'm not fussed, I like my weight and I said I don't feel like it, that he should find someone else to shape. Then he said it's lazy and selfish to want someone to like you just for you, you should want to improve yourself to make them happy. But at the same time he says I'm special and a very nice body isn't a requirement. It kinda hurts me that he wants me to change my weight (yet he argued it's not changing me) I feel like a piece of playdoh he wants to shape lol. But he said all guys would prefer their girl like that, some just don't say it or lie and that he's just honest. Thoughts? (This is making me reconsider getting back with him).