How should i have my first kiss?

well my boyfriend, he wants to kiss me and he kissed all these other girls and i havent kissed anyone yet. so i am afraid i will be the worst kisser ever and he will break up with me for it, so i want to know how to get ready for my first kiss, how to kiss my first kiss, and how do you know if your ready to have your first kiss. i REALLY need to know soon so please if you care bout a girl growing up and wanting to know stuff please help me!!!!