Advice - Tough Marriage/Divorce Situation

{Advice - Tough Marriage/Divorce Situation} Regarding divorce, you mentioned that verbal/emotional abuse is only a valid justification when it is extreme. How do we think biblically about what God would consider to be extreme? I'm finding it hard not to doubt my own perceptions, but my husband is in complete denial. Also, where the husband has essentially separated from the wife within the marriage, is it still not permissible to remarry?