Knowing that you can trust someone whether a friend, partner or a family member is the foundation to build a relationship. In order to know if you can trust someone you must understand what trust is, according to psychology trust is having confidence that a person who is trusted will do what is expected.
Here is a list of signs that you can't trust someone;
1. You have answered the question "can I trust him/her?"
If at any point in time you start asking yourself if you can trust someone, then right away you have answered the question yourself. You already know you can't trust them.
2. He/She lies
If someone can't tell you the truth that person can not be trusted. A person who lied to you once will always lie, again and again, a liar will always betray you.
3. Doesn't take responsibility for his/her mistakes
People who are trustworthy don't have a hard time accepting their mistakes, they know that it's from mistakes that people learn. If he/she doesn't take responsibility he/she can't be trusted.
4. Always gives reasons why he/she should be trusted
When someone keeps reminding and reassuring you they can be trusted, something is not right. People who are guilty always think everyone is guilty.