While I didn't exactly say it I implied that I would break up with my LTR after she made me angry the other day. I said it calmly however, and while she attempted to talk to me I blew her off for the rest of the day.

The next day she's super nice to me (nicer than usual), apologized for herself and overall seems to be trying to get on my good side. Tbh I do feel bad for threatening to breaking up with her, but is this normal? Does anyone else go through this?

I would apologize for being mean but I actually feel I did the right thing, idk I just feel like I was a jerk now that I see her being even more submissive than before.