Sunk Cost Fallacy
This is phenomenon whereby a person is reluctant to abandon a strategy or course of action because they have invested heavily in it, even when it is clear that abandonment would be more beneficial.
Wow this is basically Attachment.
In for a penny, in for a pound!
Some examples that apply
- “Oh, I stopped going to the gym, i lost all my gains, there’s no point in going back now”
- “We’ve already been together for so long, only choice is to stick”
- “I’ve already been lazy for the past 4 hours, my day is already ruined, so it’s ok to keep being lazy”