i understand ur situation.... cz u feel ur gf like kongsi wif another guy rite....
but if u love ur gf.... even she is not virgin i think is ok la....
cz nw u 1 2 find a virgin gal n u love 1 is very hard....
so think b4 u do......
NOTHING guy..........normal only, just marry her if u still love her although u are not her 1st time....
so u can go to find another second time(other girl) hehe