Hi, welcome to the ehealth forum and I am glad to help you.
The description that you have given suggests the diagnosis of anorexia nervosa with comorbid depression.
As the detrimental effects of eating disorders are immense usually caused by severe electrolyte disturbances, cardiac arrhythmias, amenorrhea, fertility issues, depression ,hypothermia, low bone density with associated risk of stress fractures, congestive heart failure, poor peer relations, low self esteem, suicidal tendencies and even death; you must not delay medical assistance and see your psychiatric specialist who may like to evaluate you with questionnaires for disordered eating behaviors and cognitions and if required institute a treatment regimen by a multidisciplinary team to help your cause. Psychotherapy, medications and hospitalization for a monitored weight gain may be required in your case.
I hope that I have been of help. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.