You might have got reported and lost it.

i losing hornorable opponent icon dun know why ... b4 i got it but now lose

You lose honorable opponent icon if you get reported too much.GOOBY PLS

Or you could have lost it if the higher ups felt that you were trading honor for the purposes of getting the red banner. Either that or you were reported for something, or reported for trading honor. All of which are possible.

It is also possible to lose the honorable ribbon if you don't receive honorable opponent if you don't receive any in a certain amount of games. Or so I hear.

I suspect that Riot divvies the ribbons out based on averages and not total. Once you hit a certain threshold within a certain amount of time, then you get the ribbon. After that you have to stay above a lower threashold to keep it. That's all speculation though.

Am i the only one it took a min and a half to comprehend what the op said?

Haha i needed a good laugh