i reinstalled minecraft, whenever i click play it loads to about 50% and the crashes

I had it downloaded a long time ago and then uninstalled it because I had no one to play it with, then my all my friends got it and I reinstalled it. I loaded the launcher and whenever I click play it loads to about 50% (or 75% if I'm lucky) then it just stops responding and says "java(tm) platform SE binary is not responding" and then would just crash.