While he is born with excess of yang energy, you have the yin energy; the polar opposite of each other.

Perhaps that's why Chongyun is so protective of you, clinging to you to keep you away from the evil spirits.

Oh, yes, he's quite overprotective but can you blame him? After all, he just want to protect you from the spirits.

He's all you need - and you need him.

’I told you not to wander off alone.’