1996 Subaru Liberty Leaking coolant, cooling system

I was just what you think is wrong with my subaru liberty its overheating but no going past just over half way on the temperture gage when I have my heater full ball sometimes it just stays normal if im driving around town, im going through coolant alot somedays like yesterday I filled it up twice today I havent had to fill it at all ive looked for leaks and it looks like its leaking from the bottom radiator hose? Do I just need to replace the house or is it the water pump or is my thermostat not working?