All of the love stories in the game always come across to me as Hollywood-esque fluff, so I have a hard time taking any of them seriously.
Cecil and Rosa (FFIV)
Locke and Celes (FFVI)
Cloud and Tifa (FFVII)
Cloud and Aeris/Aerith (FFVII)
Squall and Rinoa (FFVIII)
Zidane and Garnet/Dagger (FFIX)
Tidus & Yuna (FFX)
Other