Loss as a feeling is an inescapable part of being human. Rather than maintain the same people around us through a lifetime, we have to see them come and go. Some die, and some just disappear from our lives for other reasons. Due to these constant changes, loss is somethin we all have some amount of experience with.
K-M Skalkenæs has written about many aspects of loss, and of several different ways loss manifests itself. Death has been mentioned, and so has being abandoned by friends or family members.
What matters isn’t the loss in itself – what matters is how one deals with it.