I was with my husband for six years before we married. We actually got married on our six year anniversary.
You can absolutely have love and commitment without marriage, and I support couples that choose not to marry 100%. My husband and I spent six wonderful years getting to know each other, hammering out the kinks in our relationship, and working out what our life goals are and whether we were compatible with each other. We decided that marriage was for us, and we've never regretted it.
I do not personally believe that our marriage certificate validates our relationship. Our relationship was validated long before we walked into that church. When people ask us how long we've been married, I tell them "Four, but we've been together for ten".
We wanted to get married because it was our choice. We wanted to take that next step together, become bonded together in the eyes of the church, the public, and our friends and family. We made official what had already been for six years, and we did so because we wanted to. We've raised a beautiful daughter within this marriage and are expecting another child in December, we're in the process of buying a home, and are very much looking forward to the rest of our lives together as a family.
Again, I completely support people who don't feel marriage is for them. I always recommend that my friends live with their partners before marrying them and taking their time to make sure they're compatible and share life goals. And I respect people's opinions when they say that marriage is just a piece of paper. To me it is much more than that, but I'm not sure that I can put words to what it means to me and do it any kind of justice.
I think people should live how they feel is right for them and do what makes them happy.