you know it doesn't really matters who's better. if a fan chooses GRUVIA or GRAYLU let them be. but if it's my opinion then i more like graylu even though its impossible :)
P.S.
i also think that hiro made lyon like juvia so that gray will realize his feelings but he might change his mind and continue this love triangle i mean when i was surfing in the internet i saw something very incredible!!!!!that LYVIA and GRUVIA couple are at SEMI-CANON!!!if it was at semi-canon does that mean that the lyvia fans just catch up at the fans of gruvia (not so sure) ?! then it also means that if hiro continue this love triangle then fairy tail might have more and more fans!!!!don't you agree??!!!BUT THIS IS ONLY MY OPINION THIS IS ONLY WHAT I SAW AT THE INTERNET!!!!if you want maybe you will go to this web site so that you will know what i mean
link