Now I'm not saying this will be the same for everybody, but wanted to give some hope!
I have spent what feels like years of my life trying to coax my DS to eat (from about 18m to 3y) and he would refuse food, any food, after a few mouthfuls. Iwas worried sick but he continued to grow.
Then we got into the "I will eat but only X Y and Z" - cue food being stared at in horror if it wasn't X Y and Z and refusing to let it be on teh plate, let alone taste it!
DS was 4 in March and for the past month or so has eaten everything put in front of him - including new foods without a murmur. I really think we've cracked it now and thats without me pressuring him or panicking or forcing him to eat
So hang in htere, hopefully your small child will be like mine and just start to eat everything