inconstant

adjective

अस्थिर; चञ्चल

likely to change frequently often without apparent or cogent reason; variable

inconstant affections
अस्थिर माया

an inconstant lover
अस्थिर प्रेमी

swear not by...the inconstant moon
त्यो चञ्चल चन्द्रमाको कसम नखाऊ