But they didn't actually open up and say what they felt... it was always obvious that Tifa cared for him, but it's less certain whether Cloud's fondness for Tifa was of the same type. He cared about her, certainly, but it's uncertain whether it was love. It's possibel that Aeris had completely captured his heart. But either way, I don't think they'd be the two to rush into things so quickly. They're both very sensitive, cautious individuals who keep their emotions inside as much as possible.