Horizontal degenerative tear in medial meniscus with cartilage loss

After an MRI, I was just diagnosed with a horizontal degenerative tear of the posterior horn in the medial meniscus. I am still waiting to hear from my doc on his thoughts. I do have beginnings of osteoarthritis and some cartilage loss. I am able to walk on it after resting and crutches for the past week. It literally gave out on me in a parking lot last week - so am not trusting it. I am hoping not to do any surgery. I won't do injections. I read that some heal just by physical therapy and rest. I am in upper 60's. Any thoughts from anyone that has experienced this would help. There is, also, something called Nova Stitch that is supposed to work better - Mayo Clinic has done some trials on it. Is it possible to heal on its's own with some pampering and PT. I hear that any surgeries, shots, etc. only push one quicker to a total knee replacement - and don't want that. Thanks in advance - much appreciated!