Hi megan,
This really jumped out at me.
I was angry over the lack of support I was getting from her
I got angry of lack of support issues as well until I began to realize that I had unreal expectations about how other people should act and I was looking in the wrong places for the type of support I needed. I found that support here and in Al-Anon where I was given a set of tools that allowed me to see things as they really are and to begin to support myself. I also found a group of people who I could talk to who knew what I was going through.
I am willing to bet that your friend does not have the experience or wisdom to help you with these kind of issues and was starting to feel overwhelmed. Once I began work on myself and got my head together my friendships have actually become stronger.
Your friend,