I hate it that I can't even complete sentences when I'm excited ?

I hate it that I can't even complete sentences when I'm excited ? I'm in school and really like playing football and discussing it , but whenever I am talking about a game or a player , I get really excited and stutter so bad it makes me want to run away .I really like those few times when I don't stutter and can talk with my friends normally ,my friends have known me for a long time but I don't want to make them sit through my stuttering narratives .I really envy those who don't stutter .Damn it .