HELP! How can i get rid of my addiction to junk food?

I just cant stop munchin on like cookies, sweets/treats likee i rather munch on cookies then gs!! Ill eat healthy meals, but during the rest of the day i jus cant stop eatin junk!! (im not thatt badd, but i still need to get beter) Sometimes, i rather eat NOTHING then eat something healthy lol. I rather eat a box of cookies for dinner, then an actual meal lol!! Sooo, how can i stop thiss!!!