obsess

To preoccupy the mind of (someone) excessively.

To have the mind excessively preoccupied with a single emotion or topic.

To besiege; beset; compass about.

To attack, vex, or plague from without, as an evil spirit. See obsession, 2.

To be excessively or persistently preoccupied with something; — usually used with on or over.

To besiege; to beset.

To excessively preoccupy the thoughts or feelings of; to haunt the mind persistently.

To be preoccupied with a single topic or emotion.

To dominate the thoughts of someone.

To think or talk obsessively about.