OK, first off, a slight tear in your patellar tendon and patellar tendonitis are NOT the same thing. At. All. Patellar tendonitis is just an inflammation of the patellar tendon and while it can be painful, it can be dealt with pretty easily and you can run through it. A tear in the tendon is more serious. I'm not saying there is no recovery, but I'm sure those athletes playing ball with this injury have been undergoing rehab and are in PT.
My best suggestion is to lay off until your PT starts next week and then ask your therapist about a safe way to slowly start getting back into running. You could wind up injuring yourself worse if you are not rehabbed to a point where it's safe to begin running. At this point, what is another week?
i have patellar tendonitis also and it is just swelling, tears are "slightly" more serious. i run daily with it in training for a half-marathon. just listen to your physical therapist, pay attention to posture, and dont push it too far. you could also run with a knee brace
I think your best bet is to focus on getting better. Put 110% into PT and get strong then ease back to running. It's not fun now but you'll be much better off in the long run. I went through PT through the summer for PFPS and I'm almost where I left off as far as speed and probably stronger overall. I still baby my knees and watch my form real close now but things are improving. There's no sense causing more damage. Think long term.