Trying to believe it。
There is no one in the/this world that deserves your trust.
还有别的相近的说法, 楼主自己定夺
You cannot trust anybody in this world. 你不能相信这个世界上的任何人.
You can trust nobody in this world. 同上
There is no one in the/this world that you can trust. 这个世界上没有一个人你能相信.
Try to believe
你最好把要翻译的句子写出来,因为翻译还是要适合语境
Try to believe