How to live a long life filled with regret.
re·gret·ted, re·gret·ting, re·grets
1. To feel sorry, disappointed, distressed, or remorseful about: I regret not speaking to her before she left.
2. To remember with a feeling of loss or sorrow; mourn: “He almost regretted the penury which he had suffered during the last two years since the desperate struggle merely to keep body and soul together had deadened the pain of living” (W. Somerset Maugham).
To feel regret.
1. A feeling of sorrow, disappointment, distress, or remorse about something that one wishes could be different.
2. A sense of loss and longing for someone or something gone or passed out of existence: “We have both had flashes of regret for those vanished, golden people” (Anne Rivers Siddons).
3. regrets A courteous expression of regret, especially at having to decline an invitation.