I'll see you when I see you - A lazy way of saying you're done but you're too tired to act

A lazy way of saying you're done but you're too tired to actually say it and then you just leave them hanging.

'I'll see you when I see you' said while she was still eating her lunch and not even looking at him.

'I'll see you when I see you' said right after he saw her with her ex.

'I'll see you when I see you' said while he was still looking at his phone and not at her.