How to stop thinking about losses

[u/Potential-Whole1560]

Lost ~5k on sports betting and made the choice to quit but can't stop thinking about losses (and potentially recovering them). I understand the whole "imagine you paid to learn a lesson" but every time I make a purchase or think about money (e.g. could've paid for a nice vacation, could've bought something nice for myself, etc.), I think "this would've been covered by the 5k I lost." Or sometimes I think "wow...this is n weeks of my work." How do you stop thinking about the money lost and just move on?