You'd think that at the end, the lovers would either get together or die, right? Anyone who's seen a romantic comedy or read a Shakespeare tragedy knows how that works.
Well, these two definitely don't die, so does that mean they get together?
At the end, the bride's family finally gives a (sort-of) endorsement to the union between the two lovebirds, and according to some people, the whole thing takes place at a wedding. So, happy ending, pass the cake, etc. etc.
Of course, according to some people, the story ends where it began, on a note of longing and separation. After all, the final lines are "Make haste, my beloved, and be like a gazelle." This is a throwback to 2:17, and seems to suggest some sort of circularity and non-resolution.