Don't ever cheat
Bored? Well, try to spunk up that relationship, or else walk out of it. But don't you cheat! Cheating is no answer to boredom, and it is totally unacceptable. Make sure you tell your partner clearly that you're not happy with the way things are shaping up between the two of you, and sort it out, or else, walk out of it.
Compare not
Yes your ex must have been a darling! A gem-of-a-person none can match up to. But get the point, you ain't with that ex of yours. So, don't compare your current with your past. Instead, just be happy with what you've got at hand.
Tattle to each other
Remember, it's just you and your partner who're in this relationship, so better keep any third person aside. If there's a problem that's irking you or your partner, try and sort it out among yourself rather than involve more people. Most problems don't need a third party involvement. So, keep the others out of this one.
Say it when you mean it
We say communicate your heart out, but only when the time is right. Don't use that 'L' word for the sake of it, just because you have mistaken like for love. Contemplate on it clearly before expressing it to the other person.
Take care if you don't want someone else to
He cares for you, but you can't invest time for them? Or you're unable to tell the person how much you love them? If you're not there for someone, chances are, someone else will be there for them. So, either care for your partner, or don't crib later if someone replaces you in their life.