wish to have a better shape body

as beginning : im sorry for any language mistake as english isn't my main language

hello every one : my name is mohamed ibrahim . egyptian . almost 19 years old . height 178 cm

i was thin when i was young . but i changed by time . i used to eat like a boss for the last few years ...

when i went to weight my self and found i'm 227 lbs i was shocked and decided it's time to stop

it's all began 3 months earlier , now i'm 188 lbs . i was just eating less food and more healthier types like i stopped potatoes , burgers , fat , chocolates and sweets ... so on so on

my goal is to reach 160 lbs or something like that

i also go to gym to make my shape better .. but here is my problem , the shape of my body

it's like i'm losing weight while i'm still the same shape .. my body still look horrible . big chest . fat potbelly .. it never changes

so if some body can gimme advice then go on because i'm really getting upset right now :(

thanks all for ur time :)