Car is overheating – 1999 Pontiac Grand Am

Alright, When I first bought the car the guy i bought it from told me there was 2 problems with the car. A camshaft sensor and a map sensor. I replaced both of them, and the car still didnt crank. I think I may have flooded the engine so i let it sit overnight. Went out the next morning and it crank right up. So I tried driving it down the road and it died every time i tried to give it a little to much gas. So i unplugged the mass airflow sensor now it runs perfectly. I drove for about ten minutes and noticed my temperature gauge started rising. I parked, looked at my reservoir tank and there

– Car is overheating

Car is overheating

I was driving to work and the car overheated, opening the hood, it was steaming and coolant was spraying out of a hose near the alternator. The fan also doesn't seem to be turning on. What's the best course of action?

My car has 180000 miles.
My car has an automatic transmission.

– Car is overheating