Question:
My girlfriend said she is going to hell someday, but how can I explain to her that she is wrong; but will I be wrong in saying so? Or is God telling me that I am wrong when I try to convert her?

Answer:
If the girlfriend does not come to God confessing that she is a sinner (this is what it means to repent) and put her faith in the Lord Jesus Christ as her personal Savior she will indeed go to “hell,” which is God’s eternal judgment upon the unbeliever. Revelation 20:11-15 shows that only those who stand before God for judgment will experience terror.
You would be wrong NOT to tell her about God’s salvation that she may have by faith in Christ. God will save (convert) her if she believes God concerning His Son. Jesus says: “Most assuredly, I say to you, he who hears My word and believes in Him who sent Me has everlasting life, and shall not come into judgment, but has passed from death into life” (John 5:24).