最终，我感到足够安全，可以向我的挚友敞开心扉。

Finally, I felt safe enough to ___open ___my ___heart to my best friend.

只有在信里，他才真正敞开心扉，分享了他内心最深的恐惧。

It was only in his letters that he truly ___opened ___his ___heart and shared his deepest fears.

咨询师鼓励他敞开心扉，谈谈他背负多年的创伤经历。

The counselor encouraged him to ___open ___his ___heart about the traumatic experience he had been carrying for years.