@Maidenofwar She's a beloved character. But honestly, I'm breathing a sigh of relief that I met the Remake Aerith first, and that they took out some of her more fickle and flirtatious characteristics because, well, Zack... Have not played CC, but I watched the cut scenes on youtube. I'd be so pissed after all he did for Cloud for him to be written off as just the dead guy she wasn't serious about.
Am I the only one that doesn't think Tifa loves Cloud at the beginning of the Remake, while Cloud is the one who still holds a torch for her? The way he said, "Good night, Tifa", when she had already left the room and kept staring at the door was one indication. The other was when he got super defensive when Aerith asks if she's his girlfriend. It's not Tifa who brings up the promise either, but Cloud remembering it on his own. He even remembers their little conversation at the bar, and is aware that she's going through stuff and wants to do something for her.
But there's really no indication that she's in love, only that she's starting to develop feelings for him.
On another tangent, I do get the impression that Tifa is a huge romantic at heart though. Her tone of voice when she talks about them bumping into each other in Midgar and reuniting again, seeing her treasure that one flower he gave her, and her mentioning she looked up its meaning. Based on those things I think she must have felt like fate pulled them together somehow. I think she's developing feelings for him. There's definitely already a fondness and attraction there from the very beginning, but I don't get the feeling she's already in love with him.
She just really seems the type who needs to check a bridge a hundred times to make sure it's safe before crossing it.