CEDICT
the person one has in mind, i.e. one's beloved
Wiktionary
心中所思念或屬意的人。晉．陶淵明〈示周續之祖企謝景夷三郎時三人共在城北講禮校書〉詩：「念我意中人，相去不尋常。」後多指心中所愛戀的異性。宋．柳永〈少年遊．世間尤物意中人〉詞：「世間尤物意中人，輕細好腰身。」
重編國語辭典
classifiers: 個, 位
She was seen at a restaurant with her lover.
Source: Tatoeba
The two lovers swore to love each other for eternity.