我不想打击你英语怎么说？

burst someone's bubble

让某人的幻想破灭。

I hate to burst your bubble, but seriously, you don't stand a chance against him.

我也不想打击你的积极性，但老实说，你跟他比确实没希望。

Sorry to burst your bubble, but she isn't gonna come back to you.

别怪我打击你，她是不会回来找你的了。