The burn is a good thing, keep it up as a routine to get to that burning sensation and you'll learn to love it!
Lez never stop that burn! :-)
Seriously, it's your muscles crying for relieve. If you don't let them their only way out is to grow greater strength.
Remember to always add some real stuff cardio - you really need to burn that bacon off.
Best of luck!
The burning means you're doing it right! You just keep going until you can't take it anymore and then push yourself to do a couple of more reps.
Remember that you can't spot target fat burn. Your body doesn't work that way. First of all, check your diet. No sugar, no white flour, no juice and cut down on fruits. Eat vegetables, meat or fish, dairy products (not low fat), healthy fats and moderate amounts of wholegrain bread, brown rice etc. Drink water, not soda. No fast food. This doesn't mean you NEVER can eat treats or fast food, but you need to restrict it to a minimum.
Building abs before burning fat is not recommended, when your abs develop they will bulge out under your belly fat and make your tummy look even bigger. Do ab exercises but don't make them your main focus to begin with. Use a measuring tape to check your progress. Good luck!