Nervous about weight?

im going to a water park tomorrow, I have a one piece but I'm 169cm and 67kilos and feel too fat to wear it. Last time we went to the water park I ended up staying in my jeans and tshirt while my friends bathed in their swimsuits because I felt overweight. I'm 16, and overweight but do you think I can pull of a one piece?
Nervous about weight?
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