Can I get rid of stomach fat while keeping the fat in my legs and thighs?
Just so you know... Men who like girls with thick thighs and fat butts are after muscle, not fat. Stretching out the Levi's is all fine and great, but do understand that what you're after is probably a misconception.
To answer your question, then no, you can't spot reduce fat. The best way to think of fat is that it comes off in body sized "sheets."
Do leg exercises and get your diet straight. You'll burn fat, build muscle, and lose weight.