Advice for the weekend

So I am 16 years old and my boyfriends parents are going out of town this weekend. We’ve been planning to do it all at his place when his parents are gone. We’ve done things before like penetration. Just something to me feels weird. Like a feeling something could go wrong because it seems too good to be true. I have birth control for my periods. He promised to wear condoms each round. I’m just worried something could happen. I really don’t know what I should do.