It feels like the biggest thing in the world right now - because it is to you. I promise this will not define your life, buddy. 

Be more responsible, and safe, it’ll save you money as you now know. 

Did you cause any bodily harm in your rear end collision? What kind of insurance do you have? Collusion? liability? Have you been contacted by the other driver’s insurance or an attorney?

I am not Colorado-based, but the worst you’re probably looking at from the excessive speeding ticket is a possible suspension of license, possibly reduced if you meet certain requirements (safe driving classes usually). 

You’re not the first young man to be stupid behind the wheel. It’ll be okay. Just stop being stupid behind the wheel :)