What is unreasonable behaviour?
Infringement of personal rights
Not allowing you out alone, stopping you from interacting with certain people, limiting your freedom, changing the way you dress, controlling you financially, trying to change who you fundamentally are (eg, making you become a quiter less social person when you are naturally outgoing).
Other types of unreasonable behaviour:
Violence or threatening violence
Financially irresponsible (eg, gambling your joint money away)
Having an affair
Lack of sexual relations
Refusing to communicate and try resolve issues