How can a 13 year old girl not be frigid with her boyfriend?

At 13, adolescents are just entering sexual maturity and have no prior experince to guide them. If you want to have a sexual relationship at such an early age, be patient, there is no hurry. Sex, particularly at an early age, is an exploratory process. If a 13 year old girl doesn't feel ready for it or for some aspect of it, she probably isn't. It's youth, not frigidity.

Well I'm 13 at the moment and my boyfriend is 12. What you have to do is be relaxed and try to be funny and make jOkes but not too many because he will think your annoying. Try starting conversation and if you get the chills or butterflies just try to talk or hug or be yourself