“Really? It seems too good to be true. I don't trust it. I don't trust anyone.”
“I do trust you, is what I want to say. But it isn't true -- I didn't trust him to love me despite the terrible things I had done. I don't trust anyone to do that, but that isn't his problem; it's mine.”
“I really trust you, don't I?”
“I don't trust anyone who doesn't laugh.”
“I don't really trust a sane person.”
“I don't suppose you have many friends. Neither do I. I don't trust people who say they have a lot of friends. It's a sure sign that they don't really know anyone.”