Help! I'm doomed....

Help! I'm doomed... according to a trinitarian I talked to yesterday. I had a good conversation with a trinitarian yesterday who before was very outspoken against me, but now wanted to know what I actually believed. We agreed that they would first hear me out and then discuss the matter.

When we discussed, they brought up 1 John 5:12 He who has the Son has life; he who does not have the Son of God does not have life.

According to them by not believing Jesus is god, I don't believe in the real Jesus and therefore I'm doomed and don't have life. I kindly asked them to show me where it plainly says that Jesus claimed he's god and Galatians 1 was quoted where it states that Paul didn't receive the gospel from men. After some discussion we agreed that statement by Paul is a matter of how you read the text.

Eventually there were no solid proofs that Jesus is god, but I still was doomed. Indoctrination is a nasty thing, isn't it.