There Are Three of Us Sisters, So Who's Afraid of Whom?

One Female Lead, Urban Setting, Everyday Life, Sweet Romance

Please recommend a sweet, angst-free story with just one heroine. Don’t have her get dumped, broken up with, or cheated on right at the start. If possible, let the other woman stay in the background and not pop up every few chapters. That just keeps rubbing salt in the wound and reminding the protagonist she was cheated on. It’s painful.