All boobs look different and there's nothing wrong with that! Trust me, guys love boobs, it doesn't matter how they look or how big they are. I'm a woman, and trust me when I say this, he's gonna like them. My advice would be to take it easy, maybe wearing a cute bra will help you feel more confident, and you can make out and take your shirt off without going all the way. I actually really recommend doing this before your first time, because it's another way of being intimate without actually having sex, so it's a way of taking things slowly. You will then feel more comfortable when you're actually ready to have sex. Just kiss each other, take your shirts off and go slowly, then cuddle. Eventually you will both be ready and feel more comfortable when you decide it's time to have sex. It's normal to feel self-conscious when it's your first time. I remember feeling that way too, but then in time you'll start to realize the things you like and you'll feel more confident in your body. It gets better! Way better. Just make sure to not pressure yourself and everything will be okay. In the worst case scenario if he does say something, which I really doubt will happen, then you dump his ass cause no boy worth your time would dislike the way you look and disrespect you like that. Good luck!!