Thank you everybody for giving your input. I believe 100% as well that a truly healthy relationship can only be found in God through Jesus Christ. I also know that healthy relationships can exist even amongst atheist. Some people referenced love and sacrifice and selflessness and these types of attributes can be practical as well as spiritual. And that's why I know that a healthy relationship can exist even between two people who don't acknowledge God.
I've been involved in a lot of unhealthy relationships. I'm sad to say that most of them have been with people who believe in God and profess Christianity. We all have our faults and habits but when we have The Relationship Manual right in front of us and just continue to do the opposite of what its saying... while those who don't even acknowledge God in their lives are involved in healthy, respectful, loving, sacrificial, happy relationships, that shows me that healthy relationships are practical, and they take work. In order to build a house it takes hard work. It's sweat and toil, hammering, nailing, drilling, measuring, stacking, layering, repetition, buying material, installing, etc and anyone can do it. Most people think of dream houses but they stay just that... dreams, and settle for a little something that's affordable and comfortable all their lives. They go from apartment to apartment, renting a house, back to an apartment, etc... just enough to get by, just enough so they're comfortable. I'm not saying renting is wrong, what I'm saying is DON'T GIVE UP on building dream houses! A healthy relationship is a sure reality, you just have to be dedicated to building it. Start the work. Finish the work. Don't stop in the middle. Don't give up. I believe non-believers are putting Christians to shame because they don't even have The Blue Print, yet they are working with their own resources and building elaborate mansions. Something's wrong. We're supposed to be the light of the world, the salt of the earth, demonstrating to the world the right way. I believe right now the majority of the world views us as good for nothing, a laughing stock. We're despised and hated, not for our love for Christ but because of our lack thereof. If we claim to be Christians and truly love the Lord we should be hated for that and not because we're lazy in demonstrating him. And that is the crux of the matter: laziness and comfort. Its obvious to the blind because they can smell it and its obvious to the deaf because they can see it.
It takes hard work to build healthy relationships and we Christians have more than enough, light years more than what the world has to build them. No more excuses. We must fall down on our faces and repent for our negligence and the Lord will forgive us and pick us up and give us a brand new day to start working again. He said He will be merciful to us and that He WILL NOT REMEMBER our sins anymore (Hebrews 8:12)... do you believe that or are you going to continue to keep beating yourself up and walking around feeling defeated? Get up knowing that HE WILL NOT REMEMBER and give it your best shot always. Do your best and let God do the rest. And if you're in an unhealthy marriage that's one sided, first of all I sympathize with you and I'm sorry you're going through that. But at the same time I'm sure you know the Lord is using the evil done to you by your spouse and working it out for good (Genesis 50:20, 21). So practice 1 Peter ch. 3 with the hope that one day he or she will be won over to Christ. But you must follow the rule of 1 Peter 3 first.
If the world can healthy relationships, so can we Christians. Hopefully the tables will turn soon to where the world says 'if they can do it, we can too'.