My son weaned himself at 13 months. I was devastated. It was bottle-related... I had had a glass of wine and my husband wasn't comfortable with me nursing, so he went to comfort DS himself. Well, he ended up giving DS two bottles in a row without talking to me about it!
My son never nursed again.
I tried everything my LLL recommended. I would offer the breast and he would scream and push me away and run to the kitchen. It was probably my worst experience of rejection ever.
This went on for a long time, a few months at least.
The worst part was, I had been nursing him down for naps and at bedtime, and had never really experimented with other methods of getting him to sleep. BF was just what we did, and I planned on doing it a lot longer. My husband worked four nights a week, so I was alone with DS to put him to bed. He had no other way of being comforted by me, and so, needless to say, it didn't go well... for a long time.
I refused to give him a bottle, and tried to nurse him instead. I tried everything. There were screaming fits that lasted for HOURS. And DS has never really been a screamer. He was obviously demanding the bottle. Eventually I was so emotionally drained and exhausted that I gave him a bottle and he went right down without a peep. I think the whole effort to keep him nursing lasted about 2 months, until 15 months old.
Even now, DS is 3.5, and I still feel like crying now that I think about it. I had really bad issues with feeling like a failure as a mother, especially after having a horrible C-Section birth.
Can I just say, try to be sensitive and not judge your friend. It's so easy to jump on the board and talk about all the things she may have done wrong to cause it, or even intentionally wean her kid. But why spend so much time picking apart whether or not she did something wrong?