Why can't I lose weight? And my acne is bad?

So I'm like 5'6 and i'm a bit overweight. I feel so yucky all the time. And, to make it worse I have seriously bad acne on my t-zone, hairline, chin and jaw line. I try losing weight but it's so hard! And I wash my face everyday and it's like it gets worse and worse. I use Nike training centre on my iPhone and it works well but I never finish it. And my skin gets really bad all the time. I Kat want to be pretty like all the other girls, like all my friend are skinny and they have perfect skin. Please give me tips? I want to lose a bit of weight before I go back to school!

For the Acne: check out acne.org and seriously, go buy the regime that 'Dan' (the creater of acne.org) recommends. Seriously, it works wonders for any severity of acne. DO IT!
As for the weight, you can lose weight. Nobody can ever 'not lose weight'. You have to be highly motivated, thats probably why you never finish it. Push yourself! If you want to see results, you have to do it yourself, it's not going to happen for you. Also maybe consider a diet, just eat only when your hungry and when you do, it healthy stuff. And eat lots and lots of celery! That stuff is great for loosing weight! But most of all, do excerise and DON'T GIVE UP! Join a sports team! Being in a sports team generally gets your really motivated.
hope this helps!