Someone who always wants something, but never gives anything in return. An untrue friend will be looking out for themselves. They don't want to put themselves out, and won't. A friendship is a 50/50 relationship.
Untrue friends are not interested in your well-being. They will choose their own happiness over yours every time an opportunity is presented. They will lie about you to others.
someone who is always avoiding you when they are around others is one sign of an untrue friend. if they only talk to you when u guys are alone that another sign.