First ask yourself if you are betraying yourself. Are you going against your own rules right now? Are you behaving in a way that is not you or against your own moral code? Are you doing something you told yourself you would never do? If not, then you must be feeling someone around you is not trustworthy. Or perhaps you are feeling betrayed by life in general. Are things not working out how you expected or hoped? Remember that, ultimately, the only person you can truly count on is yourself so always be true to yourself, no matter what life throws at you or how other people treat you.