The reason for the GF thing is probablly that she was uncomfortable with his speed and asked him to slow down. He ignored her wishes and ignored a request to stop doing something that was making her nerovus. He then demonstrated she was right to be concerned when he crashed, with her in the car, as a result of excessive speed.
On the surface it would seem a harsh reason to end a relationship but from the other side of a coin here is somebody who put his girlfriend in danger and ignored her requests to slow down.
On the surface it would seem a harsh reason to end a relationship but from the other side of a coin here is somebody who put his girlfriend in danger and ignored her requests to slow down.