You can seek help of a Psychotherapist to help get clarity of what you can do. You've said you have depression. Has a doctor made a diagnosis that you have depression or your mood remains depressed or sad because you are ver weight. There is a difference in feeling depressed and having depression.
Next Steps
Search for a good Psychotherapist. An online video chat is as effective as a physical face to face session. Look for a good therapist. If you can't find one, ask me. Ill help you find someone closest to you or online
Health Tips
Take help immediately. What yo are going through is extremely common and normal. you are not the only one and you are not alone