What will my mom do if I go abroad?

I received an offer from a very good company, and I need to work in London. The salary is twice as much as in Turkey, and it's a great opportunity for my career. But my mom lives in the village, and my dad passed away a long time ago. She's saying, "How can you leave me all alone?" Would it be selfish of me to think about leaving her behind? Right now, I'm really indecisive.