is it wrong?

First, I am not offended at all but thank you for considering that.
When I say 'keep happy' I don't mean every single second of every single day. We're humans, we have bad days, bad weeks, sometimes we don't snap out of it for quite sometime. That in no way implies that since we are having a bad week and if we both are slightly unhappy, that we move on and find other partners. My point was about a situation when one or both partners feel, over a period of time, that no matter how hard they try, they cannot make this relationship work. If they are than unhappy -- we move on.

If one is handicapped, there is no guarantee the other will automatically become unhappy?? Our simple concept does not force the literal concept of 'happiness'. Its simply the fact that we both will always try to make things work. Like i mentioned, "we want to share this for as long as we live". So we don't take this concept as an easy, non guilty way out by any means. Its simply a comfort that we have not for our own sake but for the sake of the other person -- you can't make your partner happy if you're not happy with him/her.

Easier said than done? We've been together for 6 years, we've had our fair share of problems and 'unhappy moments' that we have very well overcome. We both have excellent communication and the kind of relationship most people find enviously amusing.

We do everything to be together because more than love, we share 'like'. Sometimes we have a bad day and don't exactly 'love' the other person. On those days we think of how much we 'like' them. Thats when their character, their values, how much you respect them kicks in. Our relationship is bigger and better than love. It's not as weak as love alone. And because of that, we have always made our relationship work through the toughest of times. We're fighters for our own cause but only as long as we know there is one.

I hope that answers your questions.