don't be a stranger
US /doʊnt bi ə ˈstreɪn.dʒər/
UK /doʊnt bi ə ˈstreɪn.dʒər/

1.
blijf in contact, laat van je horen
used to tell someone you want them to stay in contact with you
:
•
It was great seeing you! Don't be a stranger.
Het was geweldig je te zien! Blijf in contact.
•
We should catch up again soon, so don't be a stranger!
We moeten snel weer afspreken, dus blijf in contact!