make your move
US /meɪk jʊər muːv/
UK /meɪk jʊər muːv/

1.
to take action, especially after a period of waiting or hesitation
:
•
The time is right, you should make your move now.
•
After weeks of planning, it's finally time to make our move.
2.
to initiate a romantic or sexual advance towards someone
:
•
He's been flirting with her all night, but he hasn't dared to make his move yet.
•
If you like her, you need to make your move before someone else does.