Crash Dont Know How To Fix It :(

Put the summary of the bug you're having here

What I expected to happen was...: I Started The launcher Then When I Click Play About 5 Secs Later It Crashes
Describe what you thought should happen here
Me Being Able To Play My Game

What actually happened was...: It Crashed
Describe what happened here
It Crashed I Dont Know How To Fix

Steps to Reproduce:
1. Start Minecraft
2. Click Play
3. Crash