What's the best way I can overcome my problem?

well from your picture i would ume that you also put up a front when people talk to you. first i would seek counseling professional. second look at how your family communicates on a daily basis, are you parents very loud people where do you live are you isolated from people, what i would do is to dress so absurdly that you feel rediculous looking at your self in the mirror, and then slowly start to go to school like that see if that helps it. But on a serious note you could have social phobias from deep down trauma that need to be found and treated through counseling try that first of course.