Sounds like the ramp is your view of the future, maybe you feel like there is something in the future that is going to tear the two of you apart and force you to go separate ways, symbolized by the two people pulling you out of the car.
The car being stopped at the foot of the ramp, rather than moving up it, could mean that your relationship is stationary. Not going anywhere. Unable to go uphill (get better.)
The slow motion and difficulty moving is regular dream stuff. At some point, especially near the end of the dream, you begin to realize that you're not really moving your body and it's reflected in the dream.
At what point are you going to hold your boyfriend responsible for not assisting in fixing the relationship? You put him in the drivers' seat in your dream, so do you blame him for not being able to move forward? For being stuck in the hurtful cycle you're in?