Why am I so fussy with food?

I have a BIG problem with my tase bud. I just am sooooo fussy / picky with food and wont eat many vegtables or fruits. Even simple tomato or bannanes I wont eat. When I put it in my mouth my body just like spits it back out! idk why ad whenever I say yes I am gonna eat this I just dont cause it tastes gross. My mum isnt fussy either is anyone else in my family! I just hate it.

fruit I eat: , purple grapes , apples
vegtables I eat: corn , peas , a bit of carrot , lettuce
meat foods I eat: bacon , saussages , patties ,
rice I eat: chessy rice , normal rice

and I basically eat all types of junk food. which my mum said to me when I was younger eat what u want dont force ur self to or u'll make ur self sick! I just cant eat normal food like normal people do! its so annoying.
i asked this question cause i'm wondering why and have been my whole life and cause my year 7 graduation dance thing is comin up and where we go we have to eat there.

plz help

My cousin would get sick after he ate pumpkin pie and, for a long time believed it was the pie that was making him ill. After dealing with that for a while, his mom put whipped topping on it and changed the name of the pie. He loved it. It was what he believed that was making him sick, not the pie.

I wouldn't suggest experimenting on new foods at the dance. Unless you know you can eat what will be on the menu, take a sandwich and tell them you suffer from "PED."