I got married to my wife very recently, June 20th to be exact
, and I still have the same "bliss" I had as I watched her get out of the limo and walk up to me and our pastor. I knew her for 2 years prior, and I think that living with each other prior to marriage was an awesome idea; I do think that it has helped keep the bliss(Due to current circumstances, I can't live with my wife right now... I still think about her everyday, and knowing what its like to have been living with her helps keep my head up!).
Just look at the things you love about your partner. Always remember the wedding (or the renewal, whichever was better=^.^=) and you will always have the happiness and love.
Oh! Almost forgot... Yes, it does not matter how long you were together before getting hitched, DEPENDING on the relationship. If you both have been together for a while, you know each other, understand each other, and have a strong base needed for marriage(unless you can't stand each other for more than 5 minutes), and you will both have a great relationship that will keep the bliss alive.
Now, look at the run-away marriages... The people in question have been dating for a few months, if even, and then run off to Las Vegas, or where ever, to get hitched. Yes, the love may be there, but 2-3 months later, they are fighting, and the bliss is gone, followed hotly by divorce paperwork...
Now I understand that yes, some of the "Run-away" marriages work. I am not saying that they never work, and I meant no harm to anyone married in that fashion. I'm just saying, I personally think that length of time together before marriage is much better.
Hope this wasn't too long... I have a tendency to ramble sometimes...