live in the past
To be overly focused on the past, especially to the point of interfering with one's current situation. I know Tiffany was your dream girl, but you need to move on and stop living in the past. If you think that kind of rhetoric is still effective, you're living in the past.
live in the past
Fig. to live while dwelling on past memories without participating in the present or planning for the future. You are just living in the past. Join us in the twenty-first century. Living in the past has its advantages.
live in the past
1 have old-fashioned or outdated ideas and attitudes. 2 dwell on or reminisce at length about past events.