Male Breast Fat

How do I get rid of male breasts?
I have to go to school early and will be outrageous! I am a little fat-ish, but I see a lot people bigger than me, but do not have male breasts. I have 13 years I learned that it is "natural", but still very annoying. (
go running / jogging / swimming every day. and then doing push-ups or other exercises can work your chest.