My first dog and cat made it to 18 1/2 and 19 respectively. I was 3 years old when Mum and Dad got them for me and they passed away within 6 months of each other. That afternoon in the vet when we put Toby my dog down will stay with me especially as one of the saddest moments of my life.
There really is something amazing about the bond you can have with an animal. Just try remember all the good times with them bud! That's all ya can do