obsess
verb [ I or T ] uk/əbˈses/ us/əbˈses/
（使）着迷;（使）困扰;（使）牵挂;（使）萦回于心
If something or someone obsesses you, or if you obsess about something or someone, you think about it, him, or her all the time.
The whole relationship obsessed me for years. 这一关系多年来一直困扰着我。
She used to obsess about her weight. 她过去总是过分在意自己的体重。