我在心里默念你的名字
[wŏ zài xīn lĭ mò niàn nĭ de míng zì]
This means to silently repeat another's name within one's heart/mind - it is intimate & personal expression. The person may harbor secret love, admiration, or other special feelings towards an unnamed person, keeping those silent words close and private between themselves alone for only them to understand fully well.