My kid isn’t eating 🤦🏽‍♀️😭

For the longest time anything I sat down in front of my 2years son he would eat it all up & loved everything but now he throws it in the floor or cries when I say a plate of food in from of him. My child lives off cheese & crackers, chips & every junk food possible. I have given up.. 😭😭😭🤦🏽‍♀️ I feel like a horrible mother for this but he won’t eat anything. Now he will eat his fruits & Vegetables, but anything else nope & I’m a good cook. Any motherly advice?..