First time and anxiety

Let me preface this with the fact that I understand it might sound weird, but this is just where my mind is at right now.

My boyfriend and I started dating earlier this month, we've been friends for four years and I really do trust him.

Problem here, is that I've never been with a guy (like, only ever girls) and we're planning a date night for tonight that will lead to more. He's more experienced than me and I guess I'm just anxious for the fact it's my first time with a guy and I'm nervous I might not like it or something.

Is anyone able to provide with any advice?