I'd be lying if I said I really saw a case for it in the Scriptures.
Okay, that's a lie. I do see two explicit exceptions given. One is by Jesus, who defines adultery as divorce except for reason of unfaithfulness. If not for Paul's explicit exception for a marriage in which a believer has an unbelieving spouse (plus a bit more), I would be tempted to just think that all divorce/remarriage except for reasons of prior adultery would itself be adultery. But as it stands I really only see two possible, and Scriptural, exceptions to the mandate against divorce/remarriage:
1. Prior adultery on the part of a spouse.
2. One of the partners in the marriage is a believer, the other is not, and the unbeliever does not wish to live with the believer.
As perhaps-harsh as it sounds I don't even really think I'm seeing an 'addiction' or 'abuse' clause in what I've read. I'm well aware that many Christians throughout the ages, including one or two early Church Fathers, have found more exceptions than I. The simple 'plain interpretation' of the text doesn't seem to me to line up with almost anything I've ever seen any Christian or Christian church express (yes, including the RCC.) Is there a Scripture, or some other piece of the church historical or our hermeneutic as Christians, that I'm missing, here?
Please do discuss.