I just want to throw my two cents in here for what it's worth. I'm sure there will be others coming by shortly to tell me exactly what it's worth.

I am including all relationships in all religions.
I am no expert in relationships. I want to make that clear. I have done a lot of research and study into relationships though. I am fascinated with them. As was stated before by another, I too had a horrible marriage that ended in divorce and I wanted to learn from that huge mistake so as to not make the same one again. I had to learn why I ended up in that relationship in the first place.
This is what I have learned and what has made the most sense to me about relationships:
No relationship is perfect.
We attract to us the person that we can learn the most from.
Every person has their own lessons that they need to learn and those lessons are most likely to present themselves in a love relationship.
Some of us have more to learn than others.
Every relationship has its own uniques lessons that present themselves for each partner to learn from.
The most successful relationships are the ones that work through those lessons together and can grow from those lessons.
In every relationship there is give and take.
Every relationship hits a point of a power struggle.
As adults, we very likely repeat familiar relationships that we had when we were younger with our primary care givers. And these relationships end up repeating something painful that we experienced when we were younger in hopes of a different outcome.
Until we have worked through any pain from our past, we will continue to repeat the same pain over and over again until we have learned the lesson that we need to learn.
None of this is apparent on a conscious level. We can't simply choose to say we are going to avoid those lessons/relationships. There is a much deeper drive and attraction to those very situations that cannot be avoided until we have learned that lesson and we won't know completely we've learned the lesson until we enter another relationship or see that those lessons no longer appear in our lives.
To tell one person that their relationship is wrong or bad; you might as well tell them that their DNA is all wrong. It is who they are and no relationship is without it's power struggle. And only the two people in the relationship are the only ones that can work this out among themselves.
So there are 2 options: Either work on yourself before getting into a relationship until you are completely healed from the pain in your past (and everyone has pain-even the most perfect parents and most well-intentioned parents end up hurting their children to some extent); or find a partner who has the capability and wants to grow and is willing to help you grow as well.
As far as religion, no matter what faith you choose, all of them encourage each 'member' to grow to be more accepting, kind and loving to our fellow human beings. And that crosses all lines of religion, culture, ethnicity, etc. to grow to see that every person brings value to another and with each person, a lesson is presented to us if we choose to look at the lesson, instead of judging or criticizing each person and missing the lesson all together.
I don't see any of this as putting on rose-colored glasses. It speaks truth to me.
That's just my two cents.