I'm getting quite noisy about it. The neighbors must think I'm mad. The neighbors, for once, think right. When you feel guilty, you are feeling angry with yourself. It's OK to feel guilt, but there are limits.
Some regrets are natural, but excessive self-punishment can be harmful.
The antidote to guilt is forgiveness. You may be treating yourself far worse than the loss ever did. Don't do that. Treat yourself with love, respect, kindness and forgiveness. How I love you and hate you.