Trust is a slippery thing. You want to trust the people you love , but it takes time. Especially if you've been burned before, it can take a heck of a long time to rebuild your trust in others. Sometimes, this is a bad thing. You close people off from getting to really know you because you're scared that they might hurt you, even if they've given you no reason not to trust them. This is what therapy is good for. But in other cases, it's good not to trust someone. Because you think you might kno…