No one demands permission to depart a commitment. Thousands of people stay static in unsatisfied relations that are normally taken for bare to abusive for many grounds; but the feeling of suffocation or of having no alternatives comes from anxiety that is typically unconscious.
Men promote lots of information for remaining, ranging from taking care of young children to taking care of a sick companion. One man was too afraid and guilt-ridden to leave his ill wife (11 years his senior). Their ambivalence generated him very troubled, he passed away before she did!