hhmm.. I think this is interesting, because my Sammy has been acting the same towards me. I am sorry to hear your Luna is doing this also. How old is Luna? Sammy just turned 1 year old.
Before, Sammy couldn't get enough of me. He would sit with me every morning on my lap beore I got read for work, would wait for me to get done with my shower, and slept with me. Now, he even seems to get annoyed when I go to pet him when he is stretched out on the floor. He will run away. He only seems to love me when he is hungry. He is a "mister snotty pants" and it makes me sad!