After driving around for more than an hour the needle is not even halfway to 200. Checked the engine and its barely warm. Turned on the heater for a while and nothing. What could this be? Maybe the thermostat is stuck open or something? Radiator is topped off and the coolant bottle is just under the Full mark. The car starts up perfectly and its wasnt that cold today so all I can think of is the thermostat.

My first guess would be the same as yours, the T-stat is stuck open. Simple and cheap fix, luckily...

What do I do replace the Tstat or just take it out and look at it?

Swap it out if you already have a spare. When you remove it, it should be closed upon inspection.

Thermo was stuck way open, popped the 180 in there and Im lovin it! If I had a drill I would put a coupla small holes in it but I dont. Its working great though so I dont care to drill any holes.