I am your size/height, etc. when I was your age, I was around 130. now I am 155. plus 30 years older. I saw a pix of me yest in 1997. I thought, wow I was skinny. lol. its up to you, your choice ! I loved being that slim. I am doing ww and lost 15 lbs and would like to lose 10 more. I love to walk etc. Good luck to you and your dream weight! I started gaining at 50, taking care of my mother for 5 years. I want to stop at 145 with my age.