Loop 100-kaime no Tensei Shitsuji wa, Saiai no Akuyaku Reijou wo Kondo Koso Sukuitai

I will save you, no matter how many times it takes. In her first life, her beloved—cruelly branded as a villainess—met an untimely and tragic end. Determined to rewrite fate, she embarks on a journey of countless do-overs. Congratulations, milady! By getting rejected by Lord Valnar, you’ve successfully avoided ruin! Lianne, reeling from the humiliation of throwing tea on Prince Valnar and having her engagement dissolved, is taken aback when a mysterious butler delivers this puzzling news. According to him, she’s a villainess doomed to destruction. I’ve been reincarnated, after all. With a suspicious smile, the butler's claim is met with skepticism by the timid Lianne. But when he warns, If you stay on this path, you’ll die, her fear leaves her no choice but to heed his guidance. Thus begins a precarious struggle to navigate her supposedly cursed destiny.

https://www.cmoa.jp/title/287723/