Stuck on Logging in Minecraft Launcher

Hi minecraft, whenever I put my username and my password on the launcher. I click login in. Now its loading forever. The box on the bottom and the green thing moving toward the end. PLEASE HELP ME. If you dont get it what I am saying. I took a screen shot: http://prntscr.com/assz57
PLEASE HELP. IT DOESN'T END AT ALL I AM Stuck in like forever.