I guess we should have a heart-to-heart talk.

我想我们应该认真谈谈。


have a heart-to-heart talk:好好谈谈  例：You have been giving me the cold shoulder recently. Let's have a heart-to-heart talk.你最近对我很冷淡，让我们认真谈谈原因吧。Our relationship is drifting apart.Let's have a heart-to-heart talk.我们的关系越来越疏远了，我们好好谈谈吧。