Actions Speak Louder Than Words(people's actions are more convincing than their words are)
Listen, Jose. If you intend to ask Consuelo to marry you, you've got to get moving! Why haven't you asked her yet?
I guess I'm afraid to take the plunge, although I know she loves me and I certainly love her.
Well, the other day Mario told me he was going to buy a ring and ask Consuelo to become engaged. You can't just keep talking about marrying Consuelo. You've got to do something about it. Remember: actions speak louder than words.
Wow! You're right. If I want Consuelo to take me seriously, I've got to stop talking about getting engaged and go ask her to marry me. I just hope I'm not too late.
I don't think you've got anything to worry about. Consuelo has never been that fond of Mario. But if I were you, I'd move quickly. After all, you don't want to take any chances.
take the plunge ＝思い切ってやってみる