How can i make my girlfriend less frigid?

It wouldn't be fair to rush her into things. Maybe she's just not ready to go there with you. In her case, this might take some time. It could be that she's saving it for marriage in the future. If this is the way she feels and if these are her beliefs, there is nothing much you can do about it, and either you go with the flow, or just go your own way and move on. It's a tough choice, but a choice that has to be made since this is bothering you,