My girlfriend wants to wait before kissing, what if i kissed her? Please be serious about it?

My girlfriend and I have been going out for a month and half, and she wants to wait until we are engaged before kissing so there is no way we can mess up and have . which i completely agree on, but i really want to kiss her and everyday we snuggle together and stare in each others eyes for long periods of time. At times i see she will move in for a kiss and pull away and same goes for me. I respect what she wants so i am willing to wait but i don't know how long i can keep waiting. What could happen if when i am staring into her eyes and i kiss her what could happen. I know you don't know her but what will most girls do if in this situation. Like what bad things can happen. ooh this will be her first kiss and we are both 19. Please be serious about this and i know it weird that she wants to wait until engaged before kissing