Keep a level head about the “the grass is always greener” theory
Even if you’re happy in your relationship, you’re bound to meet other people who you recognize are attractive and whom you are even compatible with. And, when you’ve been in your relationship for a while and the excitement of things being new has worn off, you may mistake that feeling of excitement; you may meet someone at a bar and see them as being more compatible. But successful partners practice the exercise of thinking, “What would it be like if I dated this person, instead of my current partner?” and recognize that eventually, everyone becomes old news. And that their partner has solid, respectable values that make them a great partner. So why mess with success?