Learn what they are and how to identify them
What are they?
We call a "Red flag" those negative or problematic behaviors that we see in a person. These range from the way she/he is in her daily life to her/his way of thinking about life and future plans.
Why is it so important to identify them?
While some behaviors such as having childish tastes can go unnoticed, others such as aggressiveness or selfishness are enough to distance ourselves from someone.
These kinds of bad people are prone to drag those who approach them into a life of bitterness.
Even if you think that it is as simple as running away from them as soon as the problem begins to be too big, it is not. In some cases, and depending on the negative quality, these people could even use force to keep you from leaving.
All these bad times can be avoided if the red flags are identified on time
How to Identify them?
Pay attention to every detail. Sometimes a small action can say a lot about a person. Don't sit idly by if you witness a problem. Talk about it to try to find out if it was a mistake, or if on the other hand, she´s herself like that.
Learn from how that girl treats her family and friends. If she behaves selfishly with her own family, nothing good will await you. If she talks shit about people behind their backs, she will do the same to you.
Listen to what people close to her think about her. They may lie to make her look bad. However, it´s never dumb to listen to what they have to say. Once you´ve done it, and although you must always try to create your own opinions, start being careful of the problems that are said about her.