@Gaurav Tripathi,
No you can not get her back. It's over. She isn't coming back.
The sooner you accept this, the sooner your life will get better. As long as you hold on to this hope, you won't be able to heal and your life will continue to be "hell". Forget about her. Take some time to lick your wounds (it does hurt). After you are over her, you can go out and find someone who will love you back.
Then go out and live life.