I ended my diet of 4 months. Will I gain weight again?

I was 60 kgs and my height is 162 cm.. i lost 10 kgs and now im 50 kgs. i lost a lot of weight in these 4 months. so i stopped my diet because people told me to stop. but im still walking everyday for 40 minutes. i'm worried if i eat, ill gain weight... will I?