Hey... what's wrong with old? I'm old! Better an old T you "click" with than a younger one you don't. Besides... as others have pointed out... younger therapists die too, or move away, or change jobs, etc. I guess my thinking in this regard would be that this might be an excellent topic for discussion with your T. I think it could potentially lead down all sorts of interesting pathways. After all, at 42, you're at least approaching, if not already within, middle age yourself with all of the uncertainty & discomfit that age range can foment. My suggestion would be to look at this as a welcome opportunity to perhaps explore some new & interesting territory. Plus... a part of the discussion could include some give-&-take regarding how long your T plans to continue practicing & how to ensure as smooth a transition as possible as the end approaches.