There is no reason to fear losing our salvation once we have sincerely repented and followed Jesus. But you’ve got to ask yourself: Did God save me? His side of the equation is solid. God does what He says He will do. But what about your side?
What is necessary to be saved
Folks! You can NOT fake it with God. He knows your heart. Faking = Still lost. You can talk like/smell like/pray like/look like/act like/dress like/preach like/give money like/claim church membership like/go to church like… but if your heart is not genuinely His, “with all your heart…”, then you are not saved. You are a God damned “believer”. ‘You must be born again.’