I can't imagine what it is like after so many years with the smae person and then they're gone. Been married over 30 years myself and can't imagine life without my lovely wife. My father-in-law is experiencing some of the same loneliness in a way since losing my mother-in-law. He stays busy doing wood work and odd jobs around his house. It is good that you are staying fit and busy with hte water aerobics and gym.
It is sad you had to give up Mr. Poe, but it sounds like you are able to stay intouch with him and his antics. He seems to be living the good life where he is and that should settle you some and make you feel at ease.