I wish my ass was a little bigger😭

My ass isn't as flat as a pancake but I'm getting very insecure at looking at other girls butts they look so nice and round and lifted mine is just whatever. I wish I had the motivation to work out but I don't. I used to do squats and I'm starting too again but my boyfriend doesn't want me too he loves my ass it's just hard to accept the fact that's just how it is Here's a picture of it if u can see it's just hard for me to turn around an take a pic cause I'm short lol I tried