it crashed and now i cant play plzzzzzzzzzzzzz help

Put the summary of the bug you're having here
i was mining diamonds and it crashed
What I expected to happen was...:
the game would shut off than i could reload it
What actually happened was...:
it crashed and now i cant play
Describe what happened here
i was mining diamonds and it crahsed now i cant play
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...