Well today I ran alone for the first time in 7 years. My faithful running partner died last week from cancer. I know he's a dog, but he never complained about the weather, time and always wanted to go. It was different running without holding a leash in my left hand.
So sorry to hear of your running buddy's passing. It is such a shame their lives are so tragically short. I have lost a couple of running buddies over the years and feel your pain. Keep running and I am sure another running buddy will find you.