I agree with Kmn,

Fussy eaters are born, not created. all children will go through periods of fussiness. As the parent, set your face to neutral and plough on. Don't take food refusal personally. Don't think it's something that's *your fault*, be flexible, but staightforward about it - it could go on for a number of years. With 4 children including 2 teenagers I can usually be assured that some-one will tell me loudly how much they hate what I just dished up.