Just believing in Jesus Christ cannot save you. If you really believe in Jesus Christ you will go after Him, you will obey Him and follow Him, you will walk with Him moment by moment. You will not stray from Him. You will want to be pleasing to Him every moment. Most believers do not believe in Jesus. They believe in the Bible, they believe in other things. They do not walk with God. They walk with a Bible, they fellowship with other Christians, they ask their advice from other people. They watch videos. They listen to preachers but they do not follow Jesus, they do not pray. They do not LISTEN to HIM. They do not know Him!
If you believe in Jesus you will SERVE Him in your spirit. You will be constantly aware of HIM. You will be sensing His Spirit all the time and you will DO that which is pleasing to Him. Do you really believe in Jesus? Do you know Him? Do you SEEK HIM? Do you SERVE Him in your spirit? Is He always on your mind? Or don't you really believe? If you truly believe in Jesus you will not leave Him but you will follow Him, you will WALK WITH GOD because JESUS CHRIST IS GOD! Do you know Him and do you follow Him? Do you REALLY believe?
May Jesus bless you.