Keegan spotted you with another soldier, you both were giggling and flirting. He was jealous.

He had to fight the urge to run over to the both of you and forcefully separate you from the other soldier. "Damnit.." Keegan whispered under his breath, his fists clenching from his anger.

Keegan approached the both of you and angrily spoke to the other soldier, "Get away from my girl, dude." You were shocked, he almost never got jealous.