Im A Fourteen Year Old Male, Im 6 Foot 3 Inches Tall; And I Weigh 300 Pounds. How Do I Coup?

I Go Through A Lot Of Stuff During My Life. I Take Trash From Others, About My Weight. Calling Me Fat Mainly. And That Seems To Be All They CAN Talk About. Im Very Active. I Play Atleast 4 Sports, I Try My Hardest At Everything.. And Im A Strong Person And I Stay Strong Through Everything, But There Are Certain Times When I Just Have To Let All The Bottle Uped Emotions Out. (I Have To Cry And Think) My Question Is, Is It Alrite? And Are There Any Tips Or Hints That Could Help Me In Anyway To Deal With This Type Of Stuff? Please. I Need Help.