nostalgizing

Verb

nostalgize (third-person singular simple present nostalgizes, present participle nostalgizing, simple past and past participle nostalgized)

1. (transitive) To treat nostalgically.
2. (intransitive) To revel in nostalgia.
   • Appropriately enough for a crowd hung up on the fashions and music of the past, the nostalgizing began almost immediately.2007 September 10, Melena Ryzik, “The Last Night of Misshapes: Hip, Post-New-Wave and Through”, in New York Times