I want to focus a little more about Eddie and Bill’s relationship since I feel like I could have said more especially from Eddie’s perspective (they are my favorite dynamic in the group if it’s not clear lol).
I wanted to talk a little more about how they are literally codependent on one another ESPECIALLY Eddie. On this post I decided to write a couple of signs of codependency and this time even with quotes from the book.
1. Difficulty experiencing appropriate levels of self-esteem:
Eddie always brings himself down when talking about Bill who he see as this amazing figure that is so much better than him. He has an hard time even believing that someone as cool as Bill would ever be his friend because he’s such a loser.
Connected to the previous one, he sees in Bill this role model who he has to inspire and that can do bo wrong. Of course that is not true since Bill os a flawed character like anyone else.
3. A mood that reflects how others feel rather than your own emotions:
There are numerous times when his mood was ruined just because he thought that Bill was a little sad to the point he literally couldn’t focus about anything else than how Bill was feeling.
4. Constant feeling of self-sacrificing
It’s not once, but numerous times, Eddie talked about how he would be ready do to everything for Bill, even if that meant losing his life. Then maybe less extreme, but still concerning are the times he say ‘For you, Big Bill’ as if everything depended on his approval. 
Like I’ve said in my previous posts, I believe that this behavior stems from the emotional incestus relationship with his mother who basically acts like if she couldn’t live without him and the absence of father figure certainly doesn’t help.
It doesn’t help the fact that Bill didn’t even realize that this is happening or maybe even encouraged it (we don’t know what happened before the story between the two). I see that very likely because he’s a very lonely boy who barely get considered at home so maybe unconsciously he made the affection stronger so that he could get that love he so desperately missed and because in that way he knew that he at least wouldn’t leave him.
Even the fact he calls Eddie his only real friend is such an important detail: he saw Eddie as the closest person he had in his life after losing George (since we know that his parents emotionally neglected him). They both believed they had only each other so they idea that they became codependent on one another wouldn’t be really that surprising.