My boyfriend doesn’t like my big booty/wants me to lose weight

I’m in my early 20’s and my boyfriend is in his late 20’s. Ever since I was 14 I’ve always had a shape but starting around 17 I started to become more curvaceous. Around the pandemic, I gained a lot of weight and ended up getting a little “pouch” stomach. My parents are pretty financially stable so they loaned me the money for my BBL in advance & I promised to pay it back through my job. I already had a shape before the surgery so when I got the surgery my butt did look noticeably bigger, like I said though I’m still very proportionate because I’m very curvy around the hips area and I do have D breasts so my shape comes off like a hour glass. The guy I recently started dating expressed to me that he doesn’t like thicker women usually, and doesn’t like big butts so he thinks I should lose some weight. I’m healthy, I don’t have any health problems, most people I meet still would not say I’m big and just say I’m shapely. I really don’t know how to feel about this. He says he likes skinnier girls so he’s going outside of the box dealing with me…