The Scumbag Husband and His Benefactress Wife

They Don't Get Back Together After the Breakup, and the Female Lead Finds a Better Life

The female lead was tangled up with her boyfriend for five years. She even threatened to jump off a building to make him marry her, but their relationship kept growing more distant. He fell for someone else, and later she moved on and married someone else. Then her ex regretted it. Can anyone find this book?