Its impossible to give you any advice because it depends whether you feel you are psychologically addicted to something ie you have a behaviour that you repeat like gambling etc even though it can be destructive to our life (and become a 'edgy' angry or obsessive over stuff if you don't do something) or if its a real physical physiological addiction where you can feel pretty uncomfortable if you don't have a particular smoke or substance. If that is the case you might need medical supervision, We often behave in a way that causes us to feel calm and that behaviour can be a 'go to' when we feel stressed, but it isn't necessarily an addiction.
What you have to know is that usually anything you have started in life - can usually be reversed (albeit there are a few exceptions if the damage is physical or mental) So rewind the life tape and go back to the start of your journey into your 'addiction' What was happening for you in life? What did you start to use or do to help you cope with life and why? What did that substance or behaviour do for you? How did it make you feel? The difficulty in getting rid of one behaviour, is that another one starts as a substitute. You should take credit for recognising you are starting to feel 'addicted' Generally the earlier you do something about what you are worried about usually means any issues can be easier to resolve. Your behaviours aren't so entrenched. A lot of times it is an emotional pain that needs numbing, a loss in life that is like an 'itch' and hurts when you think about it. It can be the loss of a favourite pet, a family member, or a friend. There are so many losses in life - it is how we cope with them is all that is important. It is ok to feel the pain we do, it is the recognition of the relationship we had and that we lost. Unravelling the complexities of the very thing we loved (and lost) is at the heart of a lot of grief gripped inside us. Having coping strategies and a positive emotional outlook rather than addictions can be a very big buffer around you. A bit like being wrapped in bubble wrap.
I'm not sure what answers you are seeing on google? You can make an appointment with your local surgery or GP (if anyone is left there) and talk to someone. If you are under 16 years and are understanding of what is being explained etc you may be deemed 'Gillick' competent so your parents may not need to know you have approached your GP for help or treatment. Look online at FRANK for advice on substance abuse. Use MIND for general advice on emotional health and addictions. Ring childlike in confidence on 0800 1111 and chat to the staff - Go to your college or Uni and access support services there, that can be quicker than the NHS. Any advice and discussion should be in confidence unless you are deemed at serious risk of harm or injury (to yourself or others) Or use the NHS advice lines.
But above all identify those people in life who love you very much. Get lots of hugs and reassurance. Be ok with being sad and being upset if something has happened and you feel those emotions. Examine what you have lost and how that makes you feel. Explore the relationship you had. Understand what you have lost and what you miss. Sometimes that is like being on a roller coaster with no brakes. There are the ups and the downs to the very deep dips. But you will stay on and you will cope, learn to live again. If you trust yourself to cope you will. That is how we all 'grow' to have a lived in face with proper lines. If you need moral support, find someone who has a kind and beautiful soul and stay away from fillers and botox.