WordNet sense 1 (mentally or physically infirm with age):

doddering, senile, doddery

WordNet sense 2 ((used especially of persons) having lived for a relatively long time or attained a specific age):

old

WordNet sense 3 (marked by foolish or unreasoning fondness):

crazy, dotty, enamored, infatuated, smitten, in love

WordNet sense 4 (feeling or showing love and affection):

loving