Pls help me find this manhwa!

I think it was romance between gb love? But it was kinda like a setting of royalty and historical stuff (I THINK)…

The main character is a girl with i think pink hair and when she turns a certain age (i forgot which age) she dies but before she dies she takes a potion to travel back in time to save herself but she dies each time because the potion keeps making her travel back in time each time she’s die. What she doesn’t know that the person who kills her is aware that she travelled back in time and each time in each life, he is fully aware she just travelled back in time. The “he” i’m talking about might’ve had blonde hair…. But i don’t really know

if u help thank u so so much

edit: another thing i remember is that when she travels back in time again, she is ofc small, (so is the guy) and basically she takes an arrow for the guy to try and earn his trust so she doesn’t get killed, but she accidentally gets the arrow shot in a fatal place and she ended up dying and travelling back in time again lol

edit2: i think the girl lived in a manor possibly?