Been talking to guy. Want to have sex but shy

Been talking to this guy and he wants to have sex. Been sexually active since I was 16 but what holds me back is the fact I really like this guy and I'm embarrassed because I feel too fat. Does body type matter to guys when they want sex? I have a pretty face. I'm just chunky. He hasn't seen me in person for 2 years and I don't want to be a disappointment