If you are wondering if your relationship is like the relationships of others, it’s probably different. If you are wondering, you are probably too afraid to ask.
If you think marriage and children will fix things, they won’t.
You can’t fix their holes that they had when they came to you. You can’t give them your family as a replacement for what they didn’t have, no matter how much you share and shower them with love and attention. It can’t fix that which never existed.