What should I do???

I'm dating a guy who had a lot of girl friends in the past and he has prabably kissed some if not all. However this is my first true boyfriend and I never kissed a guy before. I'm a little bit nervous because what if she tries to kiss me and I don't know what to do. So my question is what should I do in this situation.

[See: http://www.romanceclass.com/miscr/LoveCat/1 ]