well, "happen" might be too strong of a word. they started অভিনয় awkward around each other, but it was clear to everyone that there seems to be something between them.
Oh, that's all? হাঃ হাঃ হাঃ well at least being conscious about it is quite a progress I guess. <3 Don't really know anything that has happened in Fairy Tail past the Tenrou Island Arc.