My girlfriend is really gullible. I mean, really, really gullible. I am really exploitive of gullible people. To the point where I take it too far. I constantly joke with her and trick her, the worse is when I try to trick her into thinking I'm cheating on her, because it drives her absoloutely nuts even though it's not true. And she knows it's not true. But she's paranoid. But I can't stop. I really... can't stop myself. When I spend a lot of time with her I get bored and boom, I start being my annoying self. I think it has to do with ADD or something. She keeps telling me to think before I say stuff but I can't. I know it's What can I do? Strange hey?