My long-time GP is retiring. It’s tough to lose my ally in life

My GP is retiring.
I found this news incredibly distressing.
I’m not sure why, after all, for the last couple of years, I have been expecting that he would either retire or he’d come a cropper while riding his motorbike to Port Douglas.
I’m glad it is the former but I’m sad nonetheless. It’s not the fear of starting off with someone new.