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(gè)人過(guò)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(yīng)該找個(gè)更好的對(duì)象。