I don't know, perhaps out there are people who just wish to see other live unhappy life. But for you to prevent your own happiness it would such a waste. There must be a big reason or a great barrier that prevent to flow of happiness, which makes acceptance is nearly a miracle. Perhaps its a guilt, or another simple nightmare.
But disturbing the flow of genuine or rather natural happiness in your life would be no different than doing it to other. A prevented happiness gives nothing but simple empty self satisfaction to anybody who made it happen.