Being sentimental means being overly emotional or attached to memories and objects from the past.
When we talk about someone being sentimental, it usually means they get a little carried away with nostalgia. Maybe they still have their childhood toys stored away in a box somewhere, or they can't bear to part with old photos of their parents. Being sentimental isn't always a bad thing - it's just a sign that someone is deeply connected to their past and the people in it.
Characterized by sentiment, sentimentality or excess emotion.
