First time 😬😬😬

Okay! So I really love my boyfriend. We've been together so long. I love this boy to death, you don't even know!😩 and for a while, like 3 months, we've been talking about having sex and I really really want to! Like I crave it all the time and I've only felt this was about him because he's so amazing 😍 anyway, I really wanna try, by the way, I'm in birth control. But I'm afraid to, not because I'm scared of getting lregnant but just because I'm very very insecure about my body! Like idk, I don't think I'm fat. I'm like 128 pounds😩😩😩🔫 gotta big booty but like no boobs and I kinda have a little tummy🙁 idk guys 😩 if I wasn't so insecure about my body I would've had sex with him by now but it's the only thing holding me back! He always always always tells me I'm beautiful and he loves me and my body the way it is, I'm glad he likes me the way I am but I don't like myself the way I am. I need advice 😩