Loving Each Other Too much..will it bring happiness or pain?

Happiness, how we defined it?, Is happiness the state of being just happy? smiling and being carefree, of all things around you?..how could someone feel happy if we didn't even know the definition of it. For me all of us have different version of what we called happiness. Being with someone I love the most, the feeling that I've been feeling that moment is what I called happiness. I have that definition but I know others won't agree. Being contented in life too, were my basis of being happy but again I know you have different opinions.

Back to the topic, I've been in a relationship for almost 7 and half years, of course relationship that long, we had encountered lots of problems and struggles that we've successfully countered. We both survive the harsh reality of the world, but then again problems just won't stop coming our way. It's as if it never gets tired of coming and hurting us both. We love each other so much that quarrels between small things seems to hurts us both deeply. Small things that you might found silly became the reason of our fights. I know and he knows how much we love each other, but I don't quite understand why we are burden by such silly topics. We are on the verge of getting married and yet we are easily affected by problems, problems that is much easier than our previous struggles. I'm always and always hoping that day would come that we'll just smile the problems that comes our way, that no matter what that problem is, as long as we're together, we can always make it easier and lighter. We're going to become stronger till death do us part.