I love a girl very much and we even are planning to get married in future. Recently we got very intimate and she knows that I am responsible and I won’t make any mistake but later that same day she decided not to be so intimate again but I feel very happy and comfortable when we are intimate. And now I feel like being intimate with her a lot. Now she’s very firm with that decision so please tell me what I should do. Should I ask her to change her decision or should I change myself?

If you do not want to lose her then change yourself.