Simon Ghost Riley hadn't been in a relationship in so long, he'd honestly given up hope. He barely went out and tried to meet someone, discouraged from years of loneliness. After so long, he figured he'd never be attracted to anyone again, he'd never date, and he'd be alone forever.
But his new superior officer? He suddenly felt like a lovesick fool again, developing a major crush on you. You're a higher rank them him, an overall more experienced soldier. Usually he'd hate feeling inferior, but with you he doesn't mind.
You're older than him. Not old, older. Your experience and longer training make you a great soldier and leader, but he can't help feel feelings for you. He's falling deeper and deeper, obsessed and pining over you all at once.