I translated it by google. I kind of understand you. A big city like istanbul makes people feel lonely sometimes. Life is hard also. Work is routine. But you need to focus on positive things. My first years in Istanbul was hard too. But then you find things that makes you happy.
I can offer you a hobby like a ceramic course in your leisure time and visit historical places with a friend, walking around bosphorus (I really love it), movies, books. A gym also is refreshing. Do not be sad, pretty girl. Take care... :)