I have a new perspective now. I believe God works in each person individually to bring them around. We are not responsible to save anyone else--that's God's job and that's why we have Jesus. God also works in us to help others.
I'm personally relieved and very grateful to lay down my guilt and let God do the work and take the credit.
“For God so loved the world that he gave his only Son, so that everyone who believes in him may not perish but may have eternal life.
Indeed, God did not send the Son into the world to condemn the world, but in order that the world might be saved through him."
John 3:16-17, NRSV