Generally, patients with moderate to severe depression will have obvious emotional reactions such as indifference or disinterest in the outside world, and generally will not be interested in relationships. If the patient is still interested in things he used to be passionate about and his own life, he is generally not depressed or only mildly depressed. The characteristic symptom of depression is persistent low mood, patients will feel depressed, loss of interest, indifference to themselves and their families. Patients are prone to blame themselves for bad things, thinking that they are a drag on the family and a burden to society, and in severe cases, patients may develop light-hearted and anorexic thoughts and suicidal behaviors. If one suffers from depression but still has the idea of falling in love, it may be merely a state of depression and has not reached true depression. In this case, the patient may also fall in love with other people, and a good way of love and dating will also help the patient’s depressive state to improve.