I think it is - IF the partners study, learn and USE the relationship skills and techniques taught by people like Barbara DeAngelis [http://www.barbaradeangelis.com/advice_CandI.asp] who helped my wife and I create a powerful, loving and consistently HAPPY marriage.
We learned to use the "20 second kiss" which is a technique to gently embrace and HOLD a long kiss with my partner to strengthen intimacy and closeness WITHOUT having an agenda like jumping into bed. The point of the 20 second kiss is to overcome the tendency to just "peck" one's partner on the face with a quick, uninspired & dispassionate kiss UNLESS they have sex in mind in which case the kiss will generally be longer!
We loved that technique and used it a lot at the beginning and still try to hold LONG kisses instead of the typical peck on the face that most couples fall down to as the relationship FADES!
There are a lot more of these intimacy/love building techniques like: frequent expressions of love and affection, kindness, politeness and overall actions and attitudes that are there at the beginning of a HOT relationship but then inevitably fade and die in most marriages where the couples simply do not know how to keep their love alive and actually GROWING.
I cannot tell you or anyone what to do or how to do it but studying and USING the good relationship skills that we found in books and at Google has made our marriage last and improve while literally everyone in our family has LOST their partner or wish they had lost them!
I could never say enogh about the values of learning how to make a relationship work and it's the best thing that could ever happen for the children of such a happy, growing relationship so,
good luck,
jim