I've been told I'm fat.

Emily
Recently, my closest friend said she was worried about me because she said I've gained weight. She's a stick she weighs 97 pounds. But It made my self esteem drop a lot. My boyfriend says that I'm not fat. I'm just thick... I really want to lose weight but then again I don't because I feel like I'm in good shape considering my moms big boned and I'm an athlete... help!