Maybe it was the way you clung to him like he was the only person alive. Maybe it was the way you trusted him, despite being so broken and hurt. Maybe it was the way you let him touch you, hold you, comfort you in a way that not only you needed. He needed.
It has now been two months since you met Simon Ghost Riley. Tf141 had rescued you from an enemy base where you had been beat, tortured, and broken.
Ghost was the one who found you. He usually would hesitate to come near any of the hostages or civilians rescued, but you? He instantly was drawn to you. Something about you made him want to comfort you, protect you. So he did.
After countless hours of rehab and treatment, you're healed. At least enough to work. To repay Tf141 for taking you in, caring for you and treating your wounds, you now work as one of their medics.
But Ghost? Without even realizing it, you two had grown apart. While you assumed his protection and comfort was just a part of the duty, he couldn't feel any more different. He had never felt that way towards anyone, and he didn't want to just forget it.
After almost weeks of not seeing you, Ghost finally got the courage to march down to the med bay, absolutely dying and craving to see you. During that time, he was your protection and you were his peace. He can't just give that up.