every time i log on it immediatly crashes

Put the summary of the bug you're having here
every time i clicked play to get on minecraft i crash

*What I expected to happen was that i would get on to minecraft *
Describe what you thought should happen here
i would b able to play with my friends
What actually happened was i crashed
Describe what happened here
it said java.lang.OutOfMemory
Steps to Reproduce:
1. Just click play
2.
3. ...