HOPEFULLY Tag told Kirby the truth about his feelings and it was requited and all was well in the world for those two. Some happy endings I just can't resist. ;) I think like years down the line, depending on how Hayley saw it, they'd get married (basically as soon as she allowed it) and have kids and be awesome. Tag also had ambitions to be a Captain some day, but I don't think he has the temperament. However, I do like the idea of him eventually becoming Navigator somewhere and doing well with being the second in command but not the responsibility of being the leader. But that's like a decade from now.
He'll always remain the little spaz that he is, loving his pals and the Sling.