To be romantically interested in or devoted to only one person. I know you're a little worried about me being around all of these beautiful women, but I only have eyes for you, my darling. You can tell by the way she looks at him that Beth only has eyes for Trent.

To be solely focused on or interested in something, often to the exclusion of or at the expense of other things. I'm not interesting in dating anyone else. I only have eyes for you, my darling. He could have stayed in his position at the company and retired a millionaire, but he only had eyes for being elected to public office. Our government only has eyes for the big cities, leaving our small rural towns to rot by the wayside.