Its just one of those things. Art, work out, drink, shoot pool, pick up girls or guys, or just whatever your into. Your best best is to heal up the kneecap, but if your still young, Im sure you'll find more fun shit to do. I recovered for 4.5 months from a skull fracture and broken collarbone. I quit drinking, took my meds and healed up. Was bored as fuck and outta work, but my main concern was to let my brain stop bleeding. Def had some cabin fever as they call it. I watched all 7 seasons of Archer 3 times and walked the dog. There is a college beach volleyball courts next to my apartment, so I lurked there with my dog till they kicked me out.