There are different ways to tell the difference between a real friend and a fake friend. Some qualities in a good friend are they are trust worthy, they listen to your thoughts, concerns and issues, and you can tell them stuff without them Judging you.
If someone doesn’t always use these traits it doesn’t make them a “bad friend”, people make mistakes and as people ourselves we should forgive and forget because one of these days were going to mess up too, it happens to all of us, when we mess up we re going to expect others to forgive us but it is a lot less likely for them to forgive us if we don’t forgive them, as the lord said in the Matthew 7:12 “do to others what you would have them do to you. A bad friend doesn’t have a problem lying to you or telling people your personal information. They have a negative attitude, they’re only there for you during good times, and they encourage you to do things that could get you in trouble instead of encouraging you to do things that will reflect positively in our life. A lot of the time with a fake friend you feel uncomfortable like they will be judgmental.
Silences are awkward so you feel the need to strike up conversation with them, sometimes you feel as though your relationship is all one sided like you are making all the effort. They make up rumors weather they are true a real friend wouldn’t put you through the emotional pain with drama, often you agree with them no matter how you feel Just to keep things civil.