there are plenty of fish in the sea
US /ðɛr ɑr ˈplɛn.ti əv fɪʃ ɪn ðə siː/
UK /ðɛr ɑr ˈplɛn.ti əv fɪʃ ɪn ðə siː/

1.
used to tell someone whose relationship has ended that there are many other people they could have a relationship with
:
•
Don't worry about your breakup; there are plenty of fish in the sea.
•
After she broke up with him, her friends reminded her that there are plenty of fish in the sea.