Fear of Commitment 

When a man says he doesn’t want to marry the woman he’s with but enjoys living with her pretending as though he is married to her already. Signs include cheating on her, numerous past relationships, never wanting to dicuss or plan the future with their current mate, not wanting to meet the family, dating her for like 7 years without considering a future with the person, or dating "unavailable" people.

The fear of commitment is a very real psycological condition for many men.

Fear of Commitment by [e-mail] May 2, 2008