Should I get a boob job even though my boyfriend is against it?

He says I’m ruining my body. I still want it. It’s something I’ve wanted for a long time. I don’t think I should not do it just because of him (we’ve only been dating a year). My breasts are very small and my stomach sticks out farther than they do and I’m fairly thin. I’m about to be 22 and want to enjoy my youth instead of feeling inadequate, not like a woman, and hating my self. I don’t plan on having kids but even if I did, I would rather have saggy bigger boobs than small deflated ones. Plus, I can always get them redone. I am Not planning on going huge. I want a small C cup, very reasonable. My question is, should I not do it because my boyfriend doesn’t want me to?

(I’m sure he’ll learn to love them, as he likes boobs)