Overview
There is turmoil in one of your friendships -- but do not worry too much about it. This person is going through a lot of uncertainty in their life, and there isn't anything you can do to help. The fact that their problems are affecting your relationship is something you should make them aware of, but do not blame them for it. Just let them know that you are there for them if and when they need you. They'll be back soon, and they'll be grateful for your patience.
