Why would she be alone? She'll have a Jedi Academy or something. She'll have friends. She'll have her whole life ahead of her.

The problem is that it sounds an awful lot like Luke 2.0. Of course she'll have Finn, Poe, BB-8, her students, etc. But those friends aren't equatable to having an equal. None of them are as fundamentally similar to her as Ben is, because Ben has experienced the same pain, loneliness, and abandonment she has.

Romance aside, Kylo and Rey are the Force's own yin and yang. He won't relapse if there's a balance to the Force and a balance within himself—lightness coexisting with darkness, neither more powerful than another. I can see them training a new order together or going off on their own, but no matter what, they must end on the same path for the saga to end satisfactorily.

If they get together 15 years after episode IX, I won't mind. But that's not what the majority of those who want them to become a couple wants.

Let's say there is no romance, but there is eventually X. I don't want to wait 10 to 15 years to finally see a happy ending for the two of them. But if that's the case, then that's just what I'd have to do.