Well for me being 69, I guess that question is not for me.
However, I would like to mention the fact that you are here for much more than your cat. Take for example this site, and the fact that you are part of the family here.
I consider you a good friend and also family, as I have said before, I have no family nor friends.
There are times that I also feel messed up and wonder why I am still here. Then along will come a lovely sunrise and/or sunset and some aspect at work will come to fruition and I get a smile.
Are you using your cat as an excuse? NO, NO and NO. Your cat is an extension of you, as when he/she cuddles up to you he/she is telling you just how important of a person you are to him/her and to others also, like me.
We are ALL together in this, and yes, I have suicide ideation every once in a while BUT knowing that I have family here and also you make everything so much better.
You are NEVER EVER alone, as you are family along with your precious cat.
Hugs, caring vibes and the knowledge that I care about YOU.
Walter