Re: mood swings?
Moodiness and mood swings can be caused by many things. It could be her personality, stress, or psychological problems, but it also could be caused by changes in the body chemistry. If your friend's body has gone through dramatic changes this could account for mood swings and personality changes. This isn't necessarily directly related to diabetes, but it could be due to medication she is now on, dramatic changes in her diet, or even a new food sensitivity that she has developed from making changes in her eating habits.
Is she aware of the problem and how it is effecting others? If so, you may want to suggest that she keep a log of when she takes her meds and when and what she eats, along with a log of when she is feeling cranky, moody, or down. Then look for patterns or consistancies.
If she is not aware, it might not be a bad idea to discuss it with her. A good friend will appreciate the feedback and honesty - and maybe you can help her get some help. Explain to her that you care about her and you are concerned that she is alienating herself from loved ones. Even if the problem is not physiological, but emotional, this will give her an opportunity to seek out some help or support.