I will confess, not only is it difficult to trust other people again, it is difficult to trust myself.
I will say, I do trust the people I have met on this forum, and at Al-Anon, for the most part. I figure people who have gone through stories similar to mine wouldn't lie to me - at least, not intentionally.
I think the A's lie to us, because they are lying to themselves, and actually start to believe it. I can forgive them for that, I suppose, but I cannot trust them because I do not know if there is any truth at all in anything they say.
I do have a hard time trusting others. Case in point:
My psychologist informed me of my copay. I have been paying that amount every time I have gone to see him.
I just got my first "statement" in the mail from the insurance. It said my copay was 2/3 what he told me it was.
Rather than believe that my psychologist got confused and didn't realize that where my insurance was concerned he fell into the "specialist" category - with the lower co-pay - I had a gut reaction that he was charging me extra to pad his own pockets or some such nonsense.
I trust my psychologist. I do not believe he would lie to me, ever, for any reason. He is a good person, and has been helping me rebuild myself, quite successfully. But for five minutes after opening that envelope, I didn't trust anybody, and it felt like the floor fell out from under me again.
Trust is hard.