If I’m driving do I have to stop?
If a cop signals you to pull over, pull over.
Failure to stop is a big mistake.
At the least you can be charged with a misdemeanor, resisting arrest without violence.
At worse aggravated fleeing.
Once the officer has his siren on and activates his overhead lights it becomes a felony. If the cop follows you at a high rate of speed it becomes aggravated fleeing usually with a minimum mandatory prison sentence.
Some cops will set you up for prison by turning on their pursuit lights and cruising behind you. Don’t confuse his lights with Christmas! It's an invitation to prison. Some cops play this game a lot, they win, and you lose.