Are you praying for a loved one? Don't give up. We do not know what is going on in another person's heart and mind, nor do we know just what God will use to bring that one to Himself. It is our job to love and pray; it is the Holy Spirit's job to convict and draw people to Christ. He is at work, even when it doesn't appear so.
"But I, when I am lifted up from the earth, will draw all men to myself" -- Jesus, as recorded in John 12:32.