Tie the knot
The grass is always greener on the other side
Clean slate/Wipe the slate clean
Curiosity killed the cat
Don't count your chickens before they hatch
Weather the storm
Take a leap of faith
Pride comes before the fall
Give (someone or something) a hand
Shake it off: "I'm just gonna shake, shake, shake, shake, shake. I shake it off, I shake it off."
Under one's breath: " When you said you looked a mess, I whispered underneath my breath"
Friends (TV show)
Caught between a rock and a hard place