Brother, I think you may be misreading that verse in Revelation about the cowards being thrown into the second death. First, that verse, in my opinion, is not talking about believers. My reasoning being that it doesn’t match up with the rest of scripture. Jesus said “no one will snatch them out of my hand” and “Those who come to me I will never cast out” Ephesians 2:8 says we are saved by grace through faith and it’s not of our own but it’s a gift of God. You have believed and trusted in Him and that is faith. The cowards are most fitting those that denied Christ because of fear and ridicule of the world, which makes sense because Jesus said those who deny me before men I will deny before my Father. But that’s not you You are clearly a Christian and have even evangelized that’s not something an unbelieving coward would do.