 Has anyone ever broken your trust? Don't you wish you could have known how untrustworthy they really were instead of learning the hard way? There are many different ways to find out whether or not someone is trustworthy to prevent heartbreak and betrayal. Some are extremely obvious. Others are small and subtle. So here are eight signs someone cannot be trusted. One, they break promises. Has this person broken promises in the past? Do they have a bad habit of spilling secrets? They promise not to tell anyone so you trust them with intimate details about your life. But sooner or later, you discover they've let your secrets slip. If you know someone who hasn't kept their promises, they'll probably do it again. Two, they hide things from you. Does someone you know hide certain parts of their lives? Are they overprotective of their phone? Do they change the subject whenever you wanna know more about them or their lives? If the answer is yes, they may have something to hide. You worry of how much you trust these people. They may be hiding things for a reason. Three, they don't understand themselves. Do you know someone who lies to themselves? For example, your friend is loud and obnoxious every time you see them. Yet, they always describe themselves as shy and reserved. Their self-image doesn't really match their behavior. In other words, they lack self-awareness so they end up lying to themselves. These people will claim to be trustworthy without realizing how untrustworthy they really are, even to themselves. Four, they're unpredictable. Is this person unpredictable? In a 1985 study, Rempel and others discovered that predictability is a powerful measure of trust. If someone is consistent, they're more likely to be truthful and dependable, whereas if someone is unpredictable, they may betray your trust. Five, they react negatively to everything. According to a 2015 study by Rodriguez and others, negative reactivity is a common sign of distrust. Does this person get angry at you for everything? If so, deep down, they may feel insecure about your friendship or relationship. They probably don't trust you. Your trust gets stronger when it's mutual. If someone trusts you, you have more reason to trust them. If not, they're more likely to go behind your back. Six, they get jealous easily. Jealousy is another tell-tale sign that your trust doesn't go both ways. Several studies have found that jealousy stems from a fundamental lack of trust. Your partner, for example, may get nervous when you're gone. Why? Because they don't completely trust you. Just like before, if someone doesn't have faith in you, they may not deserve your trust. Seven, they project their insecurities. Do you know someone who's constantly accusing you? Imagine you're having trouble in school. You're taking a really difficult class, but you're working as hard as you can to keep up. One night, you tell your friend about how you're struggling, and they suddenly accuse you of being a critter. Why would they say something like that? Chances are they're wrestling with a problem in their own life. They're thinking about quitting, so they're projecting those negative feelings onto you. Even if they aren't lying to you on purpose, projection makes it difficult to trust the advice your friends are giving you. And eight, they're just too different. In a 2002 study, De Bruyne found that similarity creates trust. In other words, you trust people who are similar to you. Why? Because we believe similar people understand us better. We assume that they know how we feel, so we trust them with fragile information. Someone who's really different may not understand the way you think, so they're less likely to preserve your trust. When someone has betrayed you, it's difficult to ever trust someone again. Those feelings of bitterness and betrayal can haunt you for years and years. So how do you know when you've met someone you can trust? Dependable friends and partners should be there when you need them. They should open up to you, and they should empathize with you. And most of all, they should trust you as much as you trust them. There are trustworthy people in the world, so don't lose hope and don't close yourself off. Do you know anyone who displays more than four of these signs explained in this video? Tell us about your experiences in the comment section below. Don't forget to click like and subscribe for more psychology content. And as always, thanks for watching.