Guilt
In some cases, You may experience guilt, as part of your depression symptoms, for losing a family member or letting a loved one (or yourself) down by making promises you couldn’t keep.
Recent studies describe the effects of nostalgia as “mixed emotions”, one that can have both positive and negative effects. These effects can also lead to a cycle of distress. You might observe spontaneous nostalgia as you go about your day, especially after sad experiences events, such as an argument with a loved one or a bad day at work/school. As a result, you start to dwell more on the past and focus on negative emotions. The distress cycle can result in more nostalgia.
Loneliness and loss
Nostalgia can also occur when you think of loved ones, whether the people you haven’t met in a long time or those you no longer talk to. It is more severe when you lose a loved one and never get over it. Anticipatory nostalgia, or a yearning for someone or something you still stand a chance of having, can also trigger anxiety and depression.
In most cases, you feel lonely when you go on a romantic outing with your partner or on a normal day chilling with your friends.
Even when you enjoy yourself, you know every day can’t be the same, and you start to miss them before they leave.