a person who is in love with another.

a person who has a sexual or romantic relationship with another.

a person with whom one conducts an extramarital sexual affair.

a person who has a strong enjoyment or liking for something, as specified

a lover of music.

a person who loves, esp. a person who has or shows a warm and general affectionate regard for others

a lover of mankind.

noun

enemy

noun

admirer , beau , beloved , boyfriend , companion , courter , darling , dear , dearest , escort , fianc , fiance , flame , girlfriend , idolizer , inamorata , inamorato , infatuate , juliet , paramour , petitioner , romeo * , significant other , solicitor , steady , suitor , suppliant , swain , sweetheart , truelove , valentine , wooer , devotee , enthusiast , fancier , adorer , amoroso , buff , cicisbeo , don juan , fan , gallant , husband , leman , lothario , mistress , philander , romeo , wife