More like on Aeriths part. During the 1st part of the game where Aeriths is still alive he's not..well. and if you go on the date with the two of then she says something about"wanting to get to know the real Cloud" and then she's killed before the real Cloud wakes up....it's really difficult to love someone you don't really know...the whole point of the emotional impact of Aeriths death is in part the wasted potential of her life. We don't get to know what COULD have been because she's dead.
There are also hints that she was only originally attracted to Cloud because of the Zack mannerisms he copied due to the reunion protocol. ( man I love this game....it managed to much story...)
Cloud in disk 1 where you rack up the love points with your chosen lady, turns out to not be you at all, YOU as you are controlling Cloud are in fact the puppet of jenova.
In disk 2 Cloud wakes up and you no longer chose for him.
It was all one big ass red herring.
OOOO all of this tea. I had always love Cloti. I love strong females like Tifa.