You must be separated before being divorced. A divorce will be granted if you have been separated for a year. The divorce process can start during the yearlong period, however the divorce judgment will not be granted until the year has passed.
You can also be divorced on the basis of cruelty or adultery by the other partner, however very few divorces proceed on this basis because it is relatively easy to divorce after being separated for a year.
Divorce is not automatic. You must apply for it through the court. Considerations of a divorce are that it may impact your entitlements, such as extended health care coverage and will not invalidate an existing will.
Once divorced, you have the right to remarry.