Omg please help!!!?

my girlfriend wants to have agian, but i dont want to tho, shes my first, a 1st in alot of things... but i just dont want to do it with her, but i wish i wanted to do it with her cause i love her, we've been dating for almost 2 years, were both 17 and on our way to college, we just started having doing it cause we wanted to wait til we were older. The reason y i dont want to do it is because during ummm well without being to graphic about it "while getting nice and cuddly" she cusses to much, i dont like that, i dont like how her moans sound i wish they were more girly and high pitched, she becomes someone else, i hope shes not doing it for me,thinking thats what i want, i just want her to be calm, stay in 1 or 2 postitions (ahem im just as uncomfortable about writing it as you are reading it)....i dont want a star and want a good girl who would let me hold her hand and kiss while its happening.