Yah, you gotta get your hands beneath the belt long, long, long before you ever think about sex.
Start by patting her bum!
But I think think that whether or not she is asexual, there is always the possibility that she may be less sexual than you. Or it could just be the shy scared virgin thing.
The main thing is whether you want to wait to find out
I was a scared virgin (took me a year and a half with my first boyfriend before we had sex). But even then I always had a sex drive! We were "fooling around" for a long time before we had sex. I was nervous at first when he started touching me down there - but I liked it..... and being slow and gentle with low expectations helps!