Be the change you wish to see in the world. This is really what the secret is to making good friends.
Nobody starts off as a good friend.
How can you know if somebody is being a good friend if you do not know what a good friend is? You need to come up with your own list of what you think makes a good friend.
With your friends, you should model the kind of friend that you want them to be. If you are unable to model that kind of friend then how can you expect them to want to be that kind of friend? Nobody can do the impossible.
Show up today and be a good friend. Just do it. Other people dream about the kind of friends that they want, make those kinds of friends by being that kind of friend.

You can never be perfect. But you can be somebody who is trying to be. The kind of friend you should be looking for is somebody who is trying to be the perfect friend.

The way you eradicate bad friends is by showing them what a good friend is. Be the friend you wish to see in your life and you will get good friends. You will make good friends.