GROW ON somebody
1) This place grows on me.
2) Holidays! "See you" in September! :)

HILARIOUS
Have you seen the hilarious picture?

BE KIDDING
1) I don´t believe you, you are kidding (me).
2) I met them in Switzerland. No kidding!

FLINCH
1) He flinched a (little) bit.
2) She flinched again, but this time it was not from fear, but surprise.

SORT something OUT
SORT OUT something
1) We sorted our problems out and everything is fine now. / We sorted out our problems and everything is fine now.
2) We have to sort some things out between us. / We have to sort out some things between us.
3) It´s time to sort it out!
4) Our problems were sorted out.