sleeping with a guy

im talking to a guy, and im going to visit him for a weekend at his college a few hours away. i have never slept a night with guy, im so nervous, i've never shown a guy me without makeup, like how do i even function?!? ew my breathes gonna smell so bad in the morning like help me.... i wear hair extensions also like how tf am i gonna pull this off do u guys have any secret tips on how to look cute and fresh all the time? ik if he rlly likes me, he will like me for me... but girl i still wanna look cute!!! i never done this. help!