Would a girl whos 5ft 3in tall and 230 lbs be considered severely obese and has a waist measurement of 43in is this dangerous?

Yes, her overweight is at a level that impacts her overall health and will most likely shorten her life as well as reduce its quality.

She can regain her health without reaching an ideal weight. Even relatively small loss, like 15 pounds, relieves the burden on her joints and her heart, reduces the chances of gall bladder and liver problems, and makes GERD and esophageal cancer less likely.

She probably should *not* go on a diet. Instead, she should educate herself about food, including portion size, calories, fat content, and salt, and attempt to eat healthy for the rest of her life. Even if she does not lose an ounce, eating better will lead to better health outcomes all her life.

Yes that is severely obese.

I often see even worse on my occasional trips to McDonalds, 350 pounders wedging themselves through the front door to order their 4 triple cheeseburger lunch and it's an ugly sight.

just rub her belly and feed her,she'll be alright

Yes, it is dangerous.  For her height, her weight is in the morbidly obese range. She should lose weight and figure out the cause of her obesity, whether it's too much fast food, sugar, sodas, or salt.  She has to figure out what the bad foods are, why she eats the way she does, then follow a plan to change her diet.  She should see a weight specialist, and soon.

Yes, morbidly obese.

it CAN be dangerous.

Yes, she's a fat lump