What about Eiko's unrequited love for Zidane?
What about Quistis' unrequited love for Squall?
What about all the sexual tension between Seifer and Quistis?
What about Shuyin and Lenne?
What about Zell and the pig-tailed girl?
What about Selphie and Irvine?
What about Beatrix and Steiner?
What about Freya and Sir Fratley?
What about Brother and Yuna? (what a joke)
What about Gippal and Rikku?

It seems the FF series is full of love....

My vote goes to Squall and Rinoa.