A person who displays nostalgia for something.
"As she looked at the old photograph, her nostalgic smile revealed how much she missed her childhood summers."
unhappy about being away and longing for familiar things or persons
"After weeks of traveling alone, she felt deeply nostalgic as she walked past the bakery where she used to meet her best friend every morning."
Of, having, or relating to nostalgia.
"The old photograph made me feel deeply nostalgic for my childhood summers at the lake."