Can I ask what made you change your mind? If you remember, of course.

I don't remember exactly, and when I rewatched the episodes, I could see it either way. I feel they're friends, but I don't get a vibe that Fu You wants more than that. I think overall, it's that I can tell Ma Gui is really sad about Fu You and the Yashou leaving, but Fu You doesn't seem sad about it. When the Yashou leave, and she says the line about being leaders and not indulging, I don't feel it's because if he confesses to her then, it would be painful/hard for her to leave him. It felt more like, she'll miss her friend.