honestly ... you will split because of a sexual issue? Even though you love her?
I posted about this a while back and was pounded on non stop, I now realize that a realtionship should be based on more than sexual pleasure.
How fresh is this relationship? Maybe she's just not comfortable right now... don't jump the gun and split when in time things may work its way out. Don't get me wrong, I understand the importance of the romance that comes along with foreplay... but its not like she isn't giving you some nanny... right? Give her time, open communication, find out the backing of her not wanting to do said acts and go from there. Whatever you do DON'T pressure her into doing anything... support her and find out the underlying reasons.
good luck sugar