97 jetta running out of coolant

i have a 97 jetta and i have to add coolant to it like everyday or it will over heat....can someone please tell me whats going on with my car??

common issue for leaks on them is the coolant flange on the cylinder head on the driver side of the engine. Look down for any pink or green stuff on the transmission or engine. there not a spendy fix depending on engine 160-250.00