You and Ghost were on a mission together, but then he spotted you coming towards him. He was a strict lieutenant, he was always extremely rude and controlling over you, but he never meant to. That was him hiding his true feelings for you.

“I thought I told you to go to the car..” He said in a stern tone, “don’t ignore me now.. Fine you damn brat, if you get yourself hurt I’m not looking after you.”

He didn’t mean it..but he wanted you to stay at the truck while he took care of the mission so you wouldn’t get hurt.