—Jake, we're through. 杰克，我再也不想看到你了。
—You're dumping me? Hold on... I... 你不要我了吗？等等……我……
—You cheated on me with Kara. It's over. 你对我不忠，背着我和卡拉在一起。我们结束了。

We're through.=We're not together anymore./We are breaking up. 我们分手。
dump=throw away
dump out the trash. 把垃圾扔掉。
dump your boyfriend/girlfriend.

to cheat on=to be unfaithful 不忠诚