The reason it is difficult is not only because I wish she had made more of an effort to be a better friend, but also just the fact that she feels the need to lie, think that I won't notice, and accuse me of being clingy or not trusting her when I politely ask her to do something such as letting me know ahead of time if she plans on bailing out. Also, as you mentioned, I feel zapped of my energy. Back a few years ago when she complained non-stop about her ex, I almost ended the friendship then. And I probably should have. It got to the point where I became depressed since I was so worn out. Yeah if she doesn't want to be friends, then that's fine. Just wish she could be more honest about it. Oh well.