only have eyes for
US /ˈoʊnli hæv aɪz fɔːr/
UK /ˈoʊnli hæv aɪz fɔːr/

1.
〜に夢中だ, 〜しか目に入らない
to be attracted to only one person and not be interested in anyone else
:
•
Ever since they met, he's only had eyes for her.
彼らは出会って以来、彼は彼女に夢中だ。
•
Even with all the beautiful people at the party, she only had eyes for her husband.
パーティーに美しい人がたくさんいたにもかかわらず、彼女は夫に夢中だった。