I have to loose 14 kgs weight in 3 months?

Within 3 months i am going to get marry. But as i am too fatty(72 kg , 5 feet 4 inches height) i am getting so many health problems at the age of 23. So Plz can anyone help me regarding this. How to loose weight.I don't have any idea how many calories are enough per one day.I think i am consuming more food than required. I am some what foody and every time i used to take spicy food than healthy food. Plz suggest me, how to loose my extra weight. My In-laws are little bit upset with my fatty personality. I want to give a big surprise to my would-be as he will be back from US by April. Plz help me.