Abuser tactics. I've seen this before.
First, they treat you bad. Make you feel worthless. Sometimes actually physically attack you. (This by the way is exactly what Sakura did: she physically attacked Mogumo and ripped their hair tie off.)
Then, they apologise. Treat you nice. Make you feel that maybe they're not that bad. To convince you to still be with them. (Sakura dressed Mogumo up nice, and was buddy-buddy with them through the shopping trip.)
Rinse, and repeat. Add a heaping dose of gaslighting and isolating the victim from social contact (like, you know, push you to choose them over your friends and loved ones, like Sakura did when she pushed Mogumo to choose the hair ties she picked out), and they create a situation where you feel like you're dependent on them, you have no worth on your own, and have to rely on them for everything.
And note, most abusers don't do this conciously. It's just how they are. (This doesn't justify them at all, of course, they're still abusers.)
In short: begone, bitch.