I remember seeing some art that had glenvar and alaine together, are they an official ship? If not they still look cute together.
Their relationship is canon! There are a few scenes in both the main series and the extras series where they're caught getting freaky with eachother, or just flirting and being dorks together.
They're in more of a "friends with benefits" situation than a boyfriend/girlfriend situation though, which hurts Alaine because she expresses in one story that she wants to have something more serious with Glenvar, but he has too many personal issues (fear of commitment, crippling alcoholism, etc) for her to deal with.
Meanwhile Glenvar knows he's fucked up but he doesn't know how to get better, and frankly, Alaine doesn't know how to help him either. They're both too immature for a "real" relationship at this point in the series, but we'll see if they can overcome their issues with time!