Настроение сейчас - broken

Is it good to take a big risk? To give up everything and to start over? To go somewhere far from your home with a little livehood? Somewhere where people don't talk in your language and you don't know anyone? What is the probability of failure?

When you can't live where you live anymore is it better to leave or to continue your miserable existence there and soon be dead inside?

My friend said I should always have a way back, a possibility to step back. Back where? Here? I don't want this here. But if I lost I would end up in nowhere. But technically do I have anything to loose?

I'll leave my friends.. Is it selfish? Maybe these words are selfish but having friends don't make me feel less lonely.

God, how could I come to this? Where was that damn fork between normal life and this pathetic existence?