By realising and admitting you have a problem you are half way there.
This is your wake up call.
Only you can do this, no one can do it for you.
You've identified the problem, now you need to take responsibility for your own actions.
Swap your bad eating habits for good ones. If you must eat between meals then eat healthy snacks. Fruit such as apples, nuts (almonds & walnuts), crisp bread, etc.
You CAN do this. All the help and guidance you need is right here on this forum.