DYNAMITE DUO > NIGHTWING & STARFIRE

Nightwing (Dick Grayson) and Batgirl (Barbara Gordon or "Babs" in the Batverse. As children of Batman and Commissioner Gordon respectively, they are the unofficial heirs of their fathers. So it shouldn't come as a surprise for the two to be in a relationship—or at least they were before. 

At the very beginning, it was purely platonic, though only from Babs' perspective. Dick, on the other hand, thought differently:

If that isn't the cutest thing ever, I don't know what is. It sort of continues like this for a little while before they start admitting their feelings for each other and actually start dating. Like any other superhero couple, they had adventures as well as challenges, one of the main ones being the fact that Babs was paralyzed by Joker, Despite her new disability, Babs and Dick actually grew closer together as Babs assumed the role of Oracle, a hacker/intelligence vigilante in the Batfamily. 

But what was the cracking point?

The apple didn't fall far from the tree and like his father (Batman), Dick was a notorious workaholic, becoming obsessed with fighting crime. Finally unable to deal with her boyfriend's absences, Babs broke up with Dick. In the comics after, the two obviously still care greatly for each other so it was only a matter of time before they got together. And fall apart again. And repeat. Hopefully they'll be permanently together sometime in the future. 

Now about Starfire. She's part of his Teen Titans life, which I might add is just a side story, a tiny little spotlight on minor heroes. I'd like to think that the Batfamily aspect of Dick's life is the one that's most important to him as it's also the one that takes up most of his time. Since it's a spin off and it's not really part of the continuity universe, many fans, including myself, don't consider her and Nightwing as canon—that's only reserved for Barbara and Dick. 

So here's to hoping for another wedding.