Definitely get a new kitten to keep her company! We lost our cairn terrier last year and our old tom cat Tim (16yrs) didn't know what to do with himself. We got a little black rescue kitten, Meg, and she has given Tim a new lease of life! Meg now ambushes Tim regularly and they roll over and over fighting in the living-room - only play fighting mind, and no harm is done to either of them. When Tim has has enough he makes it very plain and Meg leaves him alone. Meg used to amuse us by trying to sit like Tim and imitate his ways. She is now a year old and they get along like they have always known each other. Hope this helps!
Adrian (Dover, UK)