Affectionate and aggressively earnest, these follow-up messages — dubbed “millennial thank you notes” — are flooding group chats and inboxes with a tidal wave of feelings.

Impressing a crush can feel like trying to solve a Rubik’s cube in the dark. There’s always that awkward tension between ...

Looking for the perfect way to address your other half? Dive into our ultimate list of cute couple nicknames that go beyond ...