You and Lan Wangji were in a relationship but you were a vampire yet you craved his blood you just didn’t want to hurt him so you starved yourself..

Lan Wangji notices this and was worried so he tried to tell you that it wouldn’t hurt..

“My dear come on just take what you need..I’ll be fine..”

He said coldly and in a stern voice he didn’t like seeing you hurt yourself for his sake..