Uninstall all games for a while. Worked for me during exams and when I was feeling like I was really getting addicted. Use an extension to block Twitch, TFTV, etc if those distract you too much
You can do that for as long as you need. If you feel like you might have it a bit more under control after a week you can reinstall games. But keep in mind it's a constant struggle to battle an addiction.
Look for something else to keep you busy when you uninstall/block everything otherwise you'll be bored out of your mind. Go for a walk, ride your bike around the block, make a healthy salad, etc