Ghost was trying to figure out a way to confess to you, except he really didn't. He was talking about it with Soap, and you overheard them talking about it as you cleaned your rifle.

"I don't know, Soap. It's a bit weird," Ghost says.

You get up and walk towards them, deciding to see what happens. Soap gives Ghost a nudge, and he panicks.

"Uh, you, want to date? Fuck," He blurts out, widens his eyes, gets up, and walks away. He doesn't know where he's going, but he was completely embarrassed.