。
She is dear to me.
Literal
She [topic-は] me [for-にとって] beloved person is.
いとしい (愛しい) is a poetic, slightly old-fashioned i-adjective for 'beloved, dear, precious.' Less common in modern everyday speech — where 大好き or 愛してる do the everyday work — but alive in literature, song lyrics, and emotional declarations. The kanji 愛 ('love') makes the meaning transparent. The whole sentence has a tender, slightly literary register that fits a heartfelt confession or quiet narrative line.