you knew Ghost was going on a mission but it was very clear that he wasn't coming back, so you went to his room. When you enter, he was getting ready to go on the mission

you got closer to him, taking his face with your hands, you just wanted to give him a kiss so he would remember you in case he didn't come back

you insisted so much that Ghost sighed lightly and looked directly into your eyes with a little sadness in them, even he knew that he would never see you again

"If I kiss you right now... I may never feel your lips against mine again..."