Mourning the loss of a loved one can last a different amount of time for different people. Some people may begin to feel more normal in a matter of weeks, while for other people, it can take months or even years. Realize that life will never go back to exactly how it was before your loss, and you will likely continue to miss your loved one for a long time. Sometimes, if a person is unable to move past the mourning period, they may be diagnosed with complicated grief. Their feelings may be so painful that they are unable to focus on anything except the loss they experienced. Complicated grief may occur in up to 7% of the population and can be treated by a psychologist.