Proposal Idea #5: Fun and Games. When at a carnival, give your engagement ring box to a trusted employee at a game booth beforehand. Take your girlfriend to that booth later on and promise her you’ll get the best things there is. Once you win, tell her none of the prizes are good enough and let the employee give you your box. Get down on one knee and propose. And when/if she says yes, say in her ear while you’re hugging: “Told you I’d get the best thing there is.”