What should I do? (16F, 15M)

I, 16F, have been dating my boyfriend, 15M, for almost a month now. We are long distance and haven't actually met up in person yet but we are planning to soon. (Don't worry he's definitely not a predator or catfish, he goes to a school near mine and I know a lot of his friends that I've met in person).

I'm a virgin, he isn't. The thing I'm worried about is that he is always talking about boobs. How he loves big ones. His following list is FULL of girls with big boobs. I've even been told that he only dated a girl last year because she had them. I try to make mine look bigger in pictures, I guess I'm sort of insecure about it. I want to be what he wants.

I'm worried that when he sees me in person he will be disappointed. I'm worried that I won't be good enough for him. I feel like he doesn't ONLY love me for my body, but that definitely is a big factor for him, and could stop him from wanting me if I don't meet his expectations. He tells me he loves me for my personality, but a few minutes later he's back to talking about boobs.

I really don't know how to feel anymore. I just want him to love me, to find me attractive. I want to find myself attractive. I want my body to mature, not just for him, but to make myself have some confidence. It's made my insecurity much worse hearing this type of thing from him, but I want him to feel comfortable talking to me about things he likes and I don't want to shame him for it.

I really don't know what to do. Please give me any advice you can.