GET A NEW HOBBY!
Honestly, I had the same problem and I tried everything. Drinking water, negotiating with myself, asking myself if I am hungry, rationalising and other mindful techniques. It was all bs. At the end, I would be like f*** it and just binge eat.
Then I changed my lifestyle. Started going out more. Started studying in the library instead of at home. Started watching netflix with friends so I wouldn't eat by myself. and started taking dance and piano classes. Once I got myself busy, things changed for the better. So my advice from personal experience would be: GET BUSY and don't be alone for too long. Good luck!