People get divorced for various reasons, from growing apart from your spouse to having an affair. Regardless of the reason for the divorce, one spouse has to suggest the divorce without fear of a violent reaction. Sometimes, though, when someone is being abused by their spouse and they want out of the relationship, they are too afraid to suggest it.
According to the Illinois State Police, 40% of total murders of women are women killed by their husbands. These are women who are more afraid to attempt at escaping their relationship than they are of the abuse they face if they stay in the relationship.
The Illinois State Police also reported that there is no particular race or socioeconomic level at which abuse of women is more common, it happens every day to women of all types. If you think that you are alone because you are of a certain economic level that is less abusive, or another group that is less abusive, you are wrong. It happens to everyone and you should not be embarrassed about it, there are other women just like you.