get up the nerve 鼓起勇气

【例句】
I hope Jonathan finally gets up his nerve to ask his boss for a raise.
我希望Jonathan最后能鼓起勇气向老板提出晋升。

I know that I love him, I just can't seem to get up the nerve to say those words.
我知道我爱他，可我就是无法鼓起勇气说那三个字。