Want to lose some weight.. suggestions please??

i am 20.. height 5 feet 5 inches.. i am about 55 kgs.. i have more of fat on my body(less muscle m). im really desperate to lose a few kgs.. i have a wedding coming in october and i really want to look my best in it.. suggest me some good ways to shed some weight.. also i have a very hectic schedule.. i have absolutely no tym for gyming.. all i do is have light and healthy food.. suggests something plssss