Adam was in fellowship with God until the day that he sinned. On that day his fellowship with God ended, he was separated from God and he had a death sentence hanging over him. Sin separates us from God. The wages of sin is death.
Jesus came to take away the sin of the world. He takes away the guilt of those who accept Him and obey Him. Jesus gives eternal life to those who live in communion with Him every day.
Salvation is not just a matter of believing in Jesus, but of accepting Him, obeying Him, obeying His teachings, as He spoke them and as they were recorded in the gospels, Matthew, Mark, Luke and John. Repent and be baptized, stop sinning and live to please Jesus and He promised to come and dwell with us, so that we can be in fellowship with Him. We read in John 14:21″He who has My commandments and keeps them is the one who loves Me; and he who loves Me will be loved by My Father, and I will love him and will disclose Myself to him.” He gives His Holy Spirit in those who love and obey Him. The Holy Spirit leads, teaches and guides them into all truth. They follow and obey Him.
Salvation, eternal life, is about living daily in fellowship with Jesus, in obedience to Him. Sin separates us from Jesus. One single sin, one single disobedience caused Adam to die. One single sin separates you from Jesus and removes you from His fellowship.
Seek Jesus with all your heart, obey Him, live holy, follow His guidances, live in fellowship with Him and you will have life.
Stay with Him until the very end. Jesus is the only way. Seek and stay in fellowship with Jesus, all the way.
May Jesus bless you