Two's company, [but] three's a crowd/ three's nothing = Στους δύο τρίτος δεν χωρεί

[Theseus]

Prov. A way of asking a third person to leave because you want to be alone with someone. (Often implies that you want to be alone with the person because you are romantically interested in him or her.)
--When Lucy followed Mark and Nora into the drawing room, Nora turned to her and said, "Two's company, but three's a crowd." --Bill: Can I go to lunch with you and Tom?
--Jane: Two's company, three's a crowd, Bill.:lol:

 

[Zazula]

Στους δύο τρίτος δεν χωρεί.

 

[StellaP]

Θυμάμαι ότι η μακαρίτισσα Νταϊάνα, σε συνέντευξη λίγα χρόνια πριν το θάνατό της, είχε ερωτηθεί αν ευθυνόταν η Καμίλα
για τη διάλυση του γάμου της και είχε απαντήσει : Well, there were three of us in this marriage, so it was a bit crowded.

 

[Cadmian]

Στους τρεις το φανάρι δώρο.