I think im addicted to coffee. Please help. What should I do?

So I'm 16. I weigh 102 if that matters. So the problem is, I literally can't make it through school without a tall double latte (2 extra shots of espresso) on the way to school (Starbucks is down the street from my school) I think this is unhealthy so I want to stop. Is it? And how can I?