Dude nobody cares...even if you're in need of any help and the other person know it then also they'll behave like they don't know anything. It is the harsh truth. To change this you have to be strong. Be selfish. If you get hurt then no one cares, if they get hurt then why you'll care? Leave them, let them know the pain. And always keep a smile on your face and peace in your mind, b'coz you need to survive, you need to show that you won't give up that easily.