Most Helpful Guy
Everyone has different options. I think (as others have said) that you look PERFECT. I don't agree with those who say to gain weight... as you are young and as you get older, it will be harder and harder to maintain your body... so why try to pack on weight now so it's harder to deal with then.
Since you are asking... that means YOU think you need to lose weight... or at least are concerned. You need to do what makes you happy and secure with yourself. I think I see what you may find as a problem area. In the first picture, right under your hands, you kind-of bulge out and back in. Then in the last picture, there's that same bulge in the front. Now a lot of that could just be the way you are standing. But my guess is that this is your worry. And as you age, your worry will because you problem.
I would simply work on exercises that target your lower abdomen area and sides. Get rid of that now while you can. It's more toning that losing weight. Weight is not the issue... you are quite perfect. It's about sculpting to look how YOU want to look.
Believe me, most guys would kill to have you just they way you are. That ass is very nice and could actually benefit from some squats to make it stick out further.
Again... it's how YOU feel.0