What does it mean when your cat comes to you when you cry?

i have a 18 year old cat that seems to cry often. she weights little to nothing. she's always been small and not much to her. now she seems to want to eat often but will only take a few bites at time. she doesn't seem to be in pain as she still plays once in awhile . I'm not sure how to please her, but the crying get irritating any suggestions