First time help!

Alright hi. I'm a senior in high school and I really need help rn. I am soon going to be losing my virginity to a guy I've known since 6th grade. We arent officially together(personal reasons on my part) and im super freaking nervous. I have high anxiety already and im worried that im gonna ruin my first time by being so anxious or bad. Hes a really sweet trust worthy guy, im just really nervous. Any tips on how to make the first time good/better? Anything will help.