Idk what to wear.

So my boyfriends birthday party is on saturday, and we are having a bonfire at his parents house. Im going to meet his mom, dad, brother, and his friends on saturday. I wanna make a good impression on them and don't want to come off as a hoe. So should I wear something cute and warm or something collective and cute?? Im really confused on what to wear cause I'm meeting his parents and friends but still wanna look cute for him.