It's expected that friends will remain loyal to one another.
Jack is going through a depression with makes him angry and talks to Ed about it.
Ed wants to react to Jack's tough times.
Ed realizes that Jack is struggling and is patient with him.
Ed avoids Jack and talks about him to others.
Jack recovers from the depression and remains frineds with Ed for a long time.
Jack finds out and makes new friends which he sees as more trustworthy.