Did your friend give you any recommendations?
What was the cause of the bursitis?
Pain is a lagging indicator. By the time pain shows up the damage is done.
Have you had anyone look at your running technique?
And technique on other skills with impact?
A voodoo band can be used to address certain aspects of the knee.
You need to identify the cause or it will not heal.
A few to start with:
Voodoo Band Your Patella Femoral Pain
Pro Episode # 61 – How to Think about a Knee Sprain
Pro Episode # 46 – The Box Squat:  Knee Function, Rehab, Pain, and Pathology
Pro Episode # 31 – User Request Friday – Live from The Games: Patellar Tendonitis
Pro Episode # 39 – Voodoo Floss Primer: The Knee
Pro Episode # 35 – MWod Pro-User Request Friday: The IT Band Primer