Can someone please explain to me how lifting heavy makes you lean? When I lift heavy my legs get huge so I stopped and started to do an hour of cardio every other day. I'm trying to lose 10-15lbs and I'm really confused should I start lifting again if I want to lose that much weight and look toned and slender? Help me please!!
Another thing I don't understand is how girls who are way smaller than me can lift and squat the same amount of weight as I can and their thighs don't get huge like mine.
Please help, I want to be tall and lean with muscle tone.
This is what I want my body to look like but with a little more muscle tone. This body belongs to Tanaya Henry. She's 5'7 and weighs 120-125lbs.

Since I am a 5'7 20 year old female and I have the same body shape and height like her, I want advice on how to achieve this body type.
My Stats
HW: 145lbs
CW:135lbs
GW:120-125lbs