that's a really good question! firstly, i want to say that communication is very important & i am so glad to see you recognize that! :D i would try to open a dialogue with her about the situation. ask how she feels, & listen to her without interruption & remain open-minded to her feelings. showing active listening & empathy is very important. recognizing that illnesses not only impact the individual, but impact those around them as well is very important in discussion. ask her about the boundaries she needs set, & then you can ask for your own boundaries as well. this conversation with your friend can open you both to a new, healthy relationship. :)