That will be often be different for men and women.
Many men don't feel the need to get married or married again.
Especially not if they've been married before. They reason logically. It costs money, if we break up it costs money. They'll say, "what difference does it make? None!"

To a man making money, providing, being successful that way is extremely important for his sense of well-being, of being a man.

For a woman on the other hand marriage means a deeper commitment than 'just' a relationship.
For women safety is of the utmost importance. Only if she feels safe is she able to fully open up, thrive, grow, and love.
Marriage gives her that sense of safety, knowing he won't just bugger off on a whim, won't easily fall for another -maybe younger- woman, knowing and feeling he chooses her.
It's a big statement, and one a woman generally needs for reasons mentioned above.

So if a man wants his partner to be able to fully blossom and to feel safe, she can be totally vulnerable and open to a much deeper level for him, he gives her that gift. It allows her to grow in her love for her man.

This is stuff few people know.
Men generally think she's after his money, doesn't understand how incredibly important feeling safe is for a woman, which has nothing to do with his money.


As for what's better for you... only you can tell. If you want marriage then that's what is best for you. Don't compromise because of a man. Instead learn to convey your needs properly to a man so he understands why it's so important to you.