He's too shy to ask her out.

他太腼腆，不好意思约她外出。

《牛津词典》

He nerved himself to ask her out.

他鼓足勇气去约她出来。

《牛津词典》

Ted: Well, I don't have the guts to ask her out.

特德：我不敢约她出来。

youdao

But when I told her I had got permission from Dirk to ask her out she relented, obviously from feelings of hurt and bitterness.

NEWYORKER: Wakefield

Next time, ask her out for coffee.

FORBES: How to Negotiate a Raise When Your Boss Won't Ask

Several times recently, he says, he's used information he discovered on his daughter's Facebook page to spark a discussion with her in person, most recently about the need for a boy to ask her out by calling, rather than texting or emailing.

WSJ: Parents and children meet and clash on social-networking sites