Sharon keeps waiting for her partner to end things, but he benefits from keeping the door cracked open. Since he won't close it, she has to. Lock it herself and walk away instead of waiting for him to choose her or choose to leave.
Chapters
Fifth. The loop breaks when you stop waiting for him to close the door from his side. This is the key insight. Sharon is waiting for him to give her closure, for him to say it's really over, for him to stop giving her hope, for him to close the door from his side. But that's never going to happen, because he benefits from the door being cracked. He gets access to her when he wants it, emotional support when he needs it. The comfort of knowing she's still there. Why would he close that door? He won't. He can. He doesn't have to. Because it's not his door to close. It's yours. You close it. You lock it. You walk away from the porch. Not because you hate him, not because you're bitter, but because you love yourself more than you love the fantasy of what he could be.