When your relationship begins to feel lonely, frustrating and full of red flags, it may be time to reevaluate your decision to be in such a relationship. If you have constant doubts flooding your mind about your partner, try to understand whether they are cheating or lying to you about something or the other. There may be a high chance your partner is a dishonest person. There may be some sure-shot signs that indicate you are dating a pathological liar.