i want to break up.
我要分手。
it's over.
我們緣分已盡。
don't call me anymore.
別再打電話給我。
there's someone else.
我有了別人。
we're not meant for each other.
我們命中注定不適合。
i need some time alone.
我需要一個人過一陣子。
we're better off as friends.
我們做朋友比較好。
you're too good for me.
我配不上你。
you deserve a better man/woman.
你應該找個更好的對象。