as soon as the conversation started going to hell, I would have just started making a joke out of the whole thing...
"yeah... it was after my house burned down... I could have sworn I told you about that... Don't you remember? It was right after my dog ran away and I wrecked my car! Don't you remember? That family of Mexicans was living in my backyard at the time? And I was selling crack cocaine to pay the bills? ... see, there's all kinds of stuff you never knew about me... "
hahahahhahaha
w/any luck, the fo4y would forget all about it, or at least not be able to tell what you're being serious about and what you're joking about... if it came down to it, you could always cover it all up with a sarcastic, "like I would ever REALLY date a psycho!"