Not feeling good enough

So I’ve been in a relationship for a year and a half now with someone I love. I’m 17, he’s 18. But I just don’t feel good enough for him looks wise. He’s a professional athlete with this amazing body, and that means he gets to meet a lot of girls in the sporting world who all have amazing bodies. I’m not fat, but I’ve got some love handles and a little belly. He’s moving away soon and I just feel like we’re going to drift and he’s going to meet someone nice AND hot and leave me for them. I know it’s probably me being self conscious, but I just know I’m not on his level.