First time boyfriend/having sex

Soooo it’s my first time having a boyfriend ever.

He hasn’t seen my fully naked and I’m kind of embarrassed to take my underwear off. We haven’t had sex yet although we definitely will be soon...

Do guys care if you wear sexy underwear? Like I want to wear something sexy for him but I also am self conscious of my stomach area. And he knows that. It’s just something I have to get over but it’s hard