In terms of ethics... If i told my doctor i'm in love with him can he refuse to treat me?

If you declared your undying love to him, he would have to terminate the professional relationship with you. Doctors are all too aware that people indulging in such feelings can sometimes fantasise about what happens between them and their physician and the next thing is, they are facing disciplinary proceedings for improper conduct with a patient. Just keep your mouth shut if you want this doctor to continue to treat you.