Nostalgia

[Sarah]

A longing for the good old days, whether or not they were very good. Or:
A tendency to think that if you were twenty years younger, you would be happy -- as if you actually had been happy when you really were twenty years younger.

[Sarah]

Nostalgia, comes from nostros (a return home) and algos (a painful condition). So in nostalgia we see a return home to a painful condition. Homesickness

[Sarah]

When you think about how great your life was a few years ago...and then depress yourself knowing it won't be that way ever again. Ever.

[Sarah]

An endless cycle of longing for the past.

[Sarah]

The remebrance of a good time or event that makes you happy.
remembring the past.

[Sarah]

The tugging feeling you get when you watch Harry's face as he receives a cake from Hagrid on his eleventh birthday.

[Sarah]

The feeling you get when you play Jak and Daxter.

[Sarah]

A remembrance of something that was important to you, something that you loved, something you heard as a infant or a toddler, something that is unforgettable.

[Tanya Shivari]

A sentimental longing or wistful affection for a period in the past.

[Becky]

[Playing Halo] 3 in [2017], knowing it has been 10 years since it came out. [Enough said].

[Marquetta]

a feeling of pleasure and also slight sadness when you think about things that happened in the past: