I don't want to get in the backseat for my moms boyfriend.
Would you be upset if your mom told you to get in the backseat?
Yes because she thinks I'm too immature to stay in the front
Staying in the front seat when your mom's boyfriend is about to get in the car is a sign of disrespect. Instead, you should get in the backseat so that your mom can sit next to her partner.
Not all disrespect is bad, he shouldn't control her life so much. She chose to be with him and nothing can stop her.
As the child you by default need to ride in the backseat. It is also safer because airbags can kill underage kids or break your face in an accident.