I doubt that happiness even exists really, I see it as being a delusion and I believe that many people just pretend to be content around others. Being in relationships usually just causes more suffering, it's very true that you simply cannot trust people. But of course existing certainly can be very painful and there could never be anything fair about this. It's undeniably such a cruel world that we exist in and of course it can be so awful having to endure an existence that you hate.