Most often, women are capricious, when dissatisfied with the behavior of the man she loved. Did you give her an insufficient amount of attention, not only to communicate with her. The woman begins to doubt her that you really love, so she has no choice but to check the depth of your feelings. In such cases, the man begins to seem that his nervous system is tested for strength due to a lack of love, respect and trust to his person. That is, women's whims often lead to disastrous consequences. Continue the relationship becomes unbearable for both happen to break, which could have been avoided if the two just listened to each other and try to come to a mutual compromise.
In general, every person, regardless of gender, should get rid of their negative character traits. Moodiness - an obvious drawback, which must be combated. It is best to come to mutual understanding through dialogue and peaceful discussion, and not by whims, demands and ultimatums. Take care of your loved one and grant him happiness, not pain and frustration.