
Quoting
emanon
You have a change in circumstance in that his grades are suffering. He's 14, his opinion isn't going to decide anything, but would be considered. So, his advancing age and falling grades are what you go with. You could <maybe> have a compelling argument in that he's reaching an age where his interaction with his father is going to affect the kind of man grows into. Make sure that yours is not the "fun" and permissive household. If so, his desire to live with you will not be viewed to be in his best interests.