[header] How to clear regrets after someone dies [title] Let go. [step] If you keep going round and round in circles of feeling sad, depressed, and bad about yourself due to this regret, it may be time to let it go. You may need to accept that you made a mistake or that you wish things could have gone differently. 
Instead of getting down on yourself, at some point you must accept the situation and forgive yourself. [substeps] If you have a hard time letting go of the regret, write a letter to the deceased person.