only have eyes for
US /ˈoʊnli hæv aɪz fɔːr/
UK /ˈoʊnli hæv aɪz fɔːr/
1.
to be attracted to only one person and not be interested in anyone else
:
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Ever since they met, he's only had eyes for her.
•
Even with all the beautiful people at the party, she only had eyes for her husband.