I didn't marry particularily young, I was 23 I think.
I "heard" but didn't comprehend this:
the most important thing you take into a marriage is a healthy self.
I didn't do it. I didn't marry someone who had even 'heard' it. And the results are, as perhaps too many of us know, painful.
Now I'm trying to become the healthy self, and somehow hold the marriage together, imploring my spouse to please work on his "healthy self".
It isn't pleasant, it isn't pretty. I have hopes that our marriage can be one in a million; and that we can work it out bass akwards.
If you are single, (whether by choice or not) work on becoming the healthy, happy self. Imagine yourself on an island, with your basic material needs provided. When you could be happy there, with yourself, THEN leave the island and invite someone else into your world. But so important to be happy ALONE.
Those of us who where looking to fill the 'hole' by finding someone who "made us happy" (and that's most of us) need to fill the hole in ourselves, and give a 'whole, holy' person to those we share our lives with.