likely to become different

erratic

(of a person) often changing one's feelings about another person

vacillating, blowing hot and cold

moving, able to be moved, easily and quickly from place to place; (the fort form for) a mobile phone

movable, travelling

mobile

mobile

not settled

bothered, upset

(of a person, condition) not stable

doubtful

varying; changeable; a quantity or thing (e.g. cost, temperature) that can change according to conditions

changing, changeable

wavy

doubtful, weak