If God really loves us so much as some people say, why does he let his loved ones suffer?

People who believe in God believe God loves them. If you believe in God, what is your answer to this question? Yes, I know this life is a test but why would someone who loves you let you go through so much suffering?
This question was going around in my head and I was just wondering what opinion religious people hold on this subject. I myself am born into a believing but not practising family.