If I understood correctly, she died in the 1st timeline when she hanged herself.
Then when she came back to the past, the day she was supposed to meet him for the 1st time, she went to sleep hoping it was a dream but when she woke up she was back into the carriage on her way to the dragon's pond, so she killed herself the 1st time, and she went back again into the carriage so she killed herself for the 2nd...etc and that's why he said " I had no choice but to helplessly watch her doing that everytime within the abyss of time ".
Cuz he was in the pond watching her and the reason she kept on going back to the pond is that when she killed herself he turned back the time over and over again.
Dragon guy turn back time one time when she hang herself in the first timeline.
The FL wake up with all of her memories, so she try to flee the situation. But the dragon turn back time again because he need her to go into the pond to wake him up and she is unwilling.
So the FL after going to sleep sadly wake up a second time having gone back in time a second time.
She is reliving this day in the carriage for the third time.
So because she doesn't want to be with him she try to kill herself. But each time she does the dragon still deep into the pond go back in time. And it went on for like 4 times until she wake the dragon up by accident.
The FL relived the day she wake up the dragon multiple time because the dragon needed her to wake him up so he could be with her.
She remembers the day repeating that's why she kill herself.
Because she try to ignore the lake with the sleeping dragon but each time she go to sleep the time rewind.
The dragon is rewinding time to force her to go back to him and trigger the event to free him from the lake.
So she is loosing her mind kinda and kill herself hoping that death would free her from the loop.
She kill herself because she doesn't want to wake him and she want to be free from him.
he turned back time 4 times already?? and she ended her life each time?? Jesus christ is it that hard to be a good accepting partner or what????!?
he probably turned back time to when it was already too late, but even then it's just embarrassing. even if someone framed him and sent that noose to her and whatnot, why did she take it each time? if he truly loved her and treated her with love, she would not resort to such end.
at some point you gotta give up and let her live her life. cause if your partner commits in every lifetime she spends with you, there's obviously a problem...