In my opinion ... whether your relationship is a success or a failure in the long term depends on so much more than whether there is a piece of paper saying you are married or not.

If you aren't compatible, having a marriage license is not going to suddenly make you compatible. If it's not meant to be, you're going to split up, regardless of whether you're married or living together.

On the other hand, if you are soul-mates and in love and compatible with each other, you will be together for fifty years whether you lived together for a couple years before marrying or not.

I guess I don't think a diamond ring and a marriage license makes or breaks a relationship, one way or another.