Need input on crossing the professional boundary as a nurse?

[img]images/smilies/smile.gif[/img] Hi,
Im in nursing school and have been assigned to try and get input on nurses and nursing students opionions. If anyone can write some input on the topic im about to discuss, it would be wonderful!!!!!!!!!!!!!!![img]images/smilies/rolleyes.gif[/img]
In regards to nurses crossing the professional boundary: How do we maintain professional relationships? Is there anything wrong with becoming personally involved with a client? What are some warning signs that the professinal relationship is becoming unprofessional?