“老实说”的英语可以翻译为：e frank with you ...

老实说我以为再也不用见到你了。I honestly thought I'd seen the last of you.老实说，他有时也会让人厌烦。To be frank, he could also be a bit of a bore.老实说, 我一点也不赞成这个主意.To speak frankly, I don't like the idea at all....