Seriously - don't worry about it.
I was the fussiest child on the planet. I ate no fruit at all as a child, no milk from age 1.
I ate only the leanest of meat (would refuse anything that looked like it had fat on it), carrots and peas only with gravy on.
Nothing with lumps, nothing with bits. No onion, no spice, no flavour.
I lived on:
Plain bread, no butter and water - this was my favourite meal for years. Just endless slices of bread that I peeled the crusts off.
Plain meat but free of fat
Potatoes apart from boiled or new with skins on
Carrots and peas with gravy
Marmite and dairylea sandwiches
Plain hula hoops
Chocolate chip cookies
Cheese
I only drank plain water. No squash, nothing fizzy.
I have always been healthy - rarely ill and never overweight. Not a single filling either.
I eat the hugest range of food now - proper foodie. The only thing that hasn't changed is milk (can't stand it still) or fruit juice with bits in.
I sorted myself out by myself in mid teens, and got better and better in to my 20's. Now there is very little I won't eat.
I was fine, am educated to PG level. Have a good job. Not a psychopath. Nothing bad came of it! I didn't starve/get scurvy/die/go mad.
My poor mother though - I do feel bad!!