Michael,
There isn't anything wrong with being attached to your trainer. I've been flying for 9 years and I still have my trainer. Heck, I still take it out to fly it every now and then. That doesn't mean that it hasn't suffered damage, but I have always repaired any damage that happened to it. When it was to the point that covering was coming off of it every flight I recovered it, that was how I learned to cover a plane. Take care of your trainer if you like it, there is no reason why it shouldn't last.

Ken