不怨不悔不哭不闹只爱你
[bù yuàn bù huĭ bù kū bù nào zhĭ ài nĭ]
The person declares a devoted kind of love where no matter what happens, they won't blame or regret or even make any scene. They'll simply continue loving with deep dedication. The sentiment behind it could relate to unconditional love or patience.