You are amazingly insightful to be able to lid your regrets. Mine are an ever repeating tape in my head that never stops (unless I'm taking klonopin or binging on good) my regrets are like Velcro balls that stick to me and weigh me down, yet they are also irritating and prickly. My T insists I do self care activities - Walking, seeking positive people, grooming, eat healthy and when I don't I feel like the failure Velcro balls multiply.
Sleep is my biggest escape during my depressive phases. Binge reading helps to distract me too.