Please live you life as you want to. Do full work with your knee and use it as you want.

Honestly, running will slowly accentuate your arthrosis. However, your meniscus grade 2 doesn’t mean it’s torn. It’s degenerative signal intensity change. If you really like running, you should get injected with vissco supplements in knee ( like Synvisc one). This will lubricator your joint and retard your arthrosis development. Second you should try and reduce weight if you are overweight. Diet is very important in weight reduction. Third is you should follow good rehab program to strengthen your core muscles including quadriceps, hamstring and gluteal muscles. May be all these will prolong your arthrosis and will help you keep running. Please read following if you need more clarity https://www.quora.com/What-are-the-precautions-do-you-take-to-avoid-injuries-while-running-if-you-are-above-30-years-old/answer/Dr-Hetal-Chiniwala?ch=10&share=7b328170&srid=5eDY8