Hi, Greta!
I’ve been married almost 40 years, thanks.
The nature of sacramental marriage is sacrifice. (Note the similarity in words: Sacrament/Sacrifice) Sacrifice doesn’t mean things are hunky dorey for you. It means that you are willing to give everything, regardless of whether you “get back” or not. It means you stick it out even if you’re not happy. (Now, I’m not saying you have to stay in a relationship where you’re being abused. That’s different.) But Christ loves us unconditionally, in a sacrificial sort of way. That’s how we are to love our spouses! For better OR worse. In sickness and in health. To death do you part. Some people, for reasons of their own, are not capable of giving as much as the other spouse. Some are self-centered to a disordered degree. The spouse, I think, who IS aware and capable has an obligation to his/her spouse to offer prayer, penance, and sacrifice for the conversion of the other spouse. Even if one is unhappy (in the current meaning of the word vs. the theological meaning), one should be grateful to God for the opportunity to suffer and grow spiritually. How is gold purified? By lots of heat! The heat melts the gold and burns off the debris. Same for steel. It is tempered by putting it in the fire! And, so it is with us. Without a Good Friday, we cannot have an Easter Sunday. We have to have a cross in our lives. Sometimes our Cross is sitting beside us in life.
And it may take a long time before the “bad spouse” converts. St. Monica prayed for her son, St. Augustine, for 30 years before he straightened out. Guess where they both are now? Think she believes it was worth it? You betcha!
In your case, you have a great opportunity to offer up your suffering for your spouse. Hopefully, one day in heaven, he can thank you for your efforts. And maybe you’ll come to the realization that God put you two together just for the purpose of helping him convert to Christ. Just something to think about, eh?