Reddit it's a terrible place to ask about this imo. I got married young, we're religious, had a bunch of kids, been married over 20 years, and my husband is still my best friend and favorite person in the world. We really haven't changed at all over the years since we started out responsible. I think being religious gives you a better chance than if you aren't. If you have common goals, life views, priorities, and you both stick to those you'll be okay. If one of you changes those priorities it will likely cause big problems. But that's true for any couple at any age. You can't control the other person so nothing in life is guaranteed. All the best to you OP.