This used to be a problem for me, too. There is hope!
I think I was around 160 pounds before I started noticing a real difference in my thighs. A small difference, but not my imagination. It only got better from there and at this point, my upper thighs barely touch. I'm sure, with Southern heat and humidity coming this summer, I still might be uncomfortable occasionally, but nothing like I was before - I used to wear out jeans all the time!
FWIW, I'm not pear-shaped, I'm apple-shaped, so it's not like I've always carried all my weight in my thighs. That might affect your results. I also really encourage weight training. I think that made a big difference for me in getting more defined legs.