
Spoilers
Seriously spoilers
Turn back
I think when he apologizes is when he learned he almost completely broke her arms(not on purpose, he is s+upid strong). She hid it from because she was afraid what he would do(like help her, because at this point she was just trying to avoid him)(by the way he had just saved her like too when he found out) and because she thought her previous self deserved it. Her previous self killed a girl because she was talking to the prince and after killing the girl she started to stalk the prince, sexually harass the prince, and harass other people because she was ‘in loved’ with the prince. MC knows this and so doesn’t fault him for his actions towards her, she even wonder why she is even still alive for all the things her past self did. The scene when the prince gets mad and says she falls for anything that is pretty is because of an elf boy. This happens after he noticed and slowly started to believe that she has changed, like by maybe 10%, but enough to be dead asleep in front of her, despite the fact that about a month before, her previous self had laced his food and tried to have intercourses with him at the dead of night.
https://www.novelupdates.com/series/the-lady-is-a-stalker/?grr=1

Not very tactful. He goes back in time and quickly looks for her and say ‘marry me’ before recreating their past relationship. Smooth bro. ╮( ̄▽ ̄)╭
But I wonder why he said ‘This again...?’. Is he saying that because he realizes he went back into the past or did be completely reborn into a wee tot and dream, periodicals, about his past life as he grew up, but the second would make less sense since he rode on his horse after he woke up to find her, which is why he was wearing his night cloths and ‘one’ slipper when he found her. Please examine exhibits A and B.
Exhibit A:
http://www.mangago.zone/read-manga/the_villain_demands_i_love_him/uu/mpn_chapter-2327520/pg-13/
Exhibit B:
http://www.mangago.zone/read-manga/the_villain_demands_i_love_him/uu/mpn_chapter-2327520/pg-5/
http://m.qiman5.com/15669/
Thank you <3