I weigh 49 kg and I wish to get thinner, any advice?

Anonymous
I'm 1.55 meters and I'm not fat or anything but I don't feel thin enough either. I just want thinner legs... basically I wanna go back to what I looked like before puberty. I used to weigh only a bit over 30 kg and I was quite thin, now I have more feminine shape but I also gained quite a bit of weight and I'm really unhappy. What bothers me even more is that I only weigh a little more than Ariana Grande but she still looks so much thinner... It's the same case with other girls at school. Is this just my body type?
Also I want to lose weight but at the same time I'm afraid my chest area will get smaller too if I do and I don't want that either...
I weigh 49 kg and I wish to get thinner, any advice?
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