New guy new me?

So I have to vent. I’m dating this new guy! He has a bomb as body like bomb asf arms and everything( he works out). I’m a plus size queen 👑 ☺️ but his last gf is average size petite maybe a little pudge. But I’m finding it hard to get comfortable around him when we are having sex. Mostly because I do feel like he’s not use to all this goodness I’m blessing him with because of his past relationship. I do get a little self conscious and I think he is starting to notice and I want to change I really do but that always plays on the back of my head. Can someone give me like opinions and things I should do to get more comfortable with him. I love love love my body but I’m nervous to put it all on him 🤦🏾‍♀️😂 he always tells me he loves my body and why am I acting shy when I’m around him 🤷🏾‍♀️ but shit idk 😂 I’m just nervous. Talk to me nice girls plz!