every time i start minecraft no matter what version it just crashes

Put the summary of the bug you're having here

What I expected to happen was...:
me to start up minecraft and begin toplay with my friends

What actually happened was...:
i started up minecaft pressed play then my mincraft crashed and every time i started it up and pressed play it crashed

Steps to Reproduce:
1. start minecraft
2. select a version
3. press play then it should crash