How can i get wider hips a bigger, rounder butt naturally no pill/surgery?

You can not target one area to gain fat any more than you can target one area for fat loss. With age you will gain weight around your hips. For now, let it be and love your body, as it is. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get vaccinated.

Additionally, doing leg weight training work outs such as squats and deadlifts that target the gluteus will enlarge those muscles. Consult your primary care to clear you when starting a new workout