It hurts.

There is so much pain everywhere. At home, on my way to university, all i see is people suffering, people in pain and i feel helpless. How do you avoid feeling it? It's taking all my energy thinking about it all the time and the fact that i can't do anything about it drives me crazy. Every time it hurts i pray to God to stop the suffering of these people but i don't think He is going to answer this one anytime soon. I hope somebody answers my questions. Is it normal to feel others pain? How can you not feel it? How can you stop thinking about it? How can you not cry when you see pain? How can you not show that it hurts? How to be strong?