weigh 120 pounds

I so want to weigh 120 lbs. I weigh more than my mother, who may be two inches shorter than me, but is also more than thirty years older than me. It’s sad, when I tell people that I’m only 5’1’’ and 130/131 lbs, and they are thinking, for sure, “What the hell.” I don’t like to exersize though…I hope when I join a gym soon that I’ll loose weight because I hate sports, which are my only current form of exersize.