I think I realize why I’m so scared

My anxiety has been acting up A WHOLE TON, and I think Ive figured out why. Me and my boyfriend are supposed to go to the beach in Oregon in 3 days. You think I’d be nothing but happy, BUT IM SCARED. Whenever I spend the night at his house (twice now), I get really nervous sleeping in the same bed at him. I’m fine throughout hanging out with him cause I’m used to it, but bedtime, I’m all freaked out and not able to sleep unless he talks and calms me down. I think the same situation is happening with the beach, and Im freaking out. We’re both 18, been dating for 3 years, and I’ve been waiting for this for 5 years. Why 😔😔😔