Hmm, I'd say 'so called friend' as well. It sounds like she's dealing with too much in her own mind and might not be able to deal with another person's problems. That might be a temporary thing or it might be consuming for her. The thing about depression is, it's incredibly personal to the person experiencing it. I hope she's getting the help she needs because you do sound like a good friend for her and you could be there for each other. Unfortunately, she has to be willing to give a little - and from what I read here, it seems like she's not. If you're dealing with something like a broken wrist (hope you are better now!) she might not know what to say. Maybe she's so wrapped up in her own mind and her own problems, she's too depleted to offer support.
It's sad sometimes when you care about someone and they don't extend much effort into keeping the relationship going. I'd say if she reaches out, reply but not right away like you planned. If she doesn't, perhaps it's time to let her go completely. If she's desperate to talk because *she* needs you, it might be time for a serious heart to heart. Friendships are not a matter of convenience where she gets to chose when or if to reach out. That's not fair. Anyway, I do hope you have support through other people, but from what I've read here, she doesn't seem worth your time or sadness. It's sad and hard, I know, but I do hope things work out. Good luck!