It can happen..."happily" is a relative term though...I find the longer my wife are together...the stronger the appreciation is for what we have achieved...we also realize its a daily relationship...no magic answers...I've known couples that lasted a week...a year...65 years...unfortunately...I think younger folks today think of marriage as no big deal...if a few years later you aren't "happy"....its okay to move on....as well...seems like too much attention is put into the wedding itself and not the reality of what it truly takes to have a future together....