I did the same exact thing last April... I am just getting done with my PT and the healing process. It blows dude but get some stuff to read for the first couple weeks, watch tv. Don't smoke weed it makes your knee hurt more in my opinion plus every-time I did it I was so afraid of falling it just wasn't worth it. Enjoy the painkillers. When you can move get good at walking on crutches for a bit. After I was finally able to stand on my own I would go to the golf course next to my house and play on the putting green for hours on end... I cut my handicap by about 4 strokes because of that. Start going on walks, and to concerts, beaches, whatever or else you get depressed and life turns shitty. Just stay active and don't try and do anything that will hurt your knee again.
Good luck.