Thanks for your query, In my opinion, you need to tell yourself at least ten reasons (more if you are able to figure out, there are many) and write them down on a piece of paper and put that in front of you and repeat them to yourself every day as many times as you can. Don t remain with people who take any substance. remain occupied with some work or with your family. And last but not the least consult a psychiatrist, who can be of immense help during the withdrawal phase and to keep your motivation high