Hot Temperature

Ok, another question for all you techies......

I have noticed over the last couple of weeks that the temperature reading on 2012 RS SM5 is reading two analog notches above normal (normal is 3) after a idling at a stop light waiting for the light to change. I begin to smell antifreeze after about 3 minutes of idling but i don't see any liquid or steam. After i return home i look for any leaks from hoses, radiator, etc. only to discover the ground is dry. Since i am fairly new to Spyders i want to diagnose it like a car (lol). I want to say it is the thermostat that is possibly broken and getting stuck closed. I can't be sure but i would think that if it's the water pump it would be spraying liquid all over the place. Am i right, wrong?
All thoughts are welcomed and appreciated....