my 15 month old doesn't want to eat food, just breastmilk!

Can someone help me PLEASE!!!!!! I have been struggling ALOT with my 15 month old with his eating!!! He doesn't eat food, just breasmilk. I offer him all kinds of food and he doesn't want to eat it, but he is at the weight that he supposed to be at and he is growing pretty healthy. Any mommies out there going through the same thing? I would really appreciate any tips on how to get him to start eating food.