U have to make sure that at the end all those stress
and unhappiness is worth it. But really, how can we be 100% sure of that?
Second, you have to be able to cheer yourself up all the time, otherwise you will just be the miserable person 24/7.
Third, you have to afford to be fake all the time. You can't lose it in the office of course, and you can't bring your negativeness back home either. It's your choice to suffer, your family didn't chose it and suffer along with you.
Man, my person experience is: it's very hard.