Talk to your priest, but if a divorce happens over your objections, you are not culpable for the divorce. You may not re-marry unless the marriage was an invalid one, but you will probably be in standing to remain in communion. You might have plenty of sins to confess, but the divorce itself wouldn't necessarily be on your head.
There is no sin for which repentance is not possible. With repentance, heaven is always possible. The sin against the Holy Spirit, which cannot be forgiven, is the sin which refuses forgiveness. There are a few situations in which an excommunication is incurred which has to be removed by the Holy See once the person repents, but divorce is not one of them. Rather, if you repent and amend your life, you are usually returned immediately to communion. (This is getting into things that your confessor would explain better.)
You might explain to your wife that even from a secular view, there is "done" and then there is "done". Even when a marriage cannot be repaired in the sense of a husband and wife being able to live in peace in the same house, the relationship is going to exist after the divorce. You have friends in common, you have relatives in common. Agreements need to be made about how to be civilized to each other, if nothing else. If there are children, this step is simply not negotiable. As I tell my unmarried relatives: Marry well and carefully. You may think you can get a divorce from your spouse, but an "ex" is forever.
Furthermore, people who just quit and don't do any finishing work when they leave a marriage have a much greater chance of repeating the same mistake and divorcing again. If not for you, she owes it to herself to figure out what went wrong. Talking to you and hearing your side of things, as warped as she may believe that thinking to be, is part of that. IOW, if she just leaves you, history says that she will find herself married to someone very much like you later in her life, frustrated by the same things that frustrate her now. She needs to learn about what those things are, how to prevent them, and how to cope with them when they happen.
Those who don't learn from their own history are doomed to repeat it. If your wife won't go to counselling, go yourself. But if you can get her into a counsellor and have good faith yourself, who knows what might happen. Try to be faithful, let God take care of success.