How can I stop being so self-conscious?

Alright,so I know that no one is perfect and no one looks perfect-including me.I'm fifteen years old,with everydays ups and downs.I have good days,and bad days,but then again,I don't want to be so hard on myself about my image.
I'm not skinny and I don't consider myself having the best skin.I have large thighs,a big nose,or at least I personally think so,big chest,and large hips.Sometimes,I get the feeling that I can't look at myself in the mirror.
Anyways,I have this friend,who seems to have a nice body,but then again,she's more self conscious about herself than I'll ever be,but then again,all the guys basically love her,which makes me jealous at times.
I also have this issue with my skin.I've had acne since I was in middle school,and I have problems with making it clear up.I feel even more conscious about that.Well,my question to all of you is that,how can I not make myself feel so conscious about myself?Hopefully,I just want one-less thing to worry about.

Be confident.

Even with your physical imperfections, confidence can mask it off for you.

theres a condition that makes you think youre ugly. sumfing about it was in dolly or girlfriend one of those mags. try their website

al the guys luv her for her body. is that hoow you want to b luvd???

therees a million kids in my school who have bad bad acne

pretend its not there to everybody. Pretend youre the most glamourous thing on 2 legs (without a tail)

dont be a slut just to get attention. thats a pretty sick thign to do and guys just laugh at you behind your back. I know- my best guy friend makes fun of those girls all the time
the chicks gossip bout em too.

I have a big nose as well put a lighter powder down the midle of your nose than on the sides to hid it. jLo duz it and I think it worx

your body is awesome!!! I guess thats weird from a girl saying it but anywayz many people would kill for that.