When "the one" doesn't think YOU are "the one"

[Bluetiful]

I'm just wondering if anyone here has found "the one" and been together a long time. Then when you think that it's time to take the next step and start discussing marriage (because things have been going great for 5 years - never lived together though) "the one" tells you that he doesn't think that you are "the one" for him. There are no kids involved. The is no cheating, no lying, no abuse of any type involved. It was just an honest heart-to-heart-with-your-best-friend kind of conversation. Nobody is mad at anyone because nobody did anything to anyone. That might have made it easier to leave, weird as it may sound. You know you're a great catch and you know you can't convince the person of this if he doesn't already think so. So you leave.

If you're willing to share, I'm interested in knowing your story. What happened? Where did you find yourself months/years later after "the one" told you that you were not "the one" for him/her? Did you ever find someone else who thought you were "the one?" Does anyone have a happy ending to share- yours or anyone else's?

Thank you in advance to anyone who replies. . . .