What can I do about my tree trunk legs which also lack skin elasticity? (photos)

I'm 5'6" and have never weighed less than 145. I'm 35. My weight has always been concentrated in my legs my entire life. However, the past 3 years, my skin's elasticity in my legs looks like that of someone 20 years older. My legs make me look so much fatter and out shape than what I really am. It doesn't help that they're not even shapely. They go straight up and down like tree trunks. I'm so self-conscious. What can I do? I do exercise and no amount of squats have every defined my legs.