Set a goal to be a better friend to someone. see yourself as a better friend. then say happiness gratitude over and over. as you keep doing that you will feel a chnage in who you are becoming. keep saying those words over and over. it is hard work. but in a short time you will have created a version of your self as a better friend.
Now you know that tool works and you can use it on anouther slightly bigger goa The key is to start using the tool.