It doesn't matter what I feel or what you feel, it only matters what is true and God has the monopoly on that. God says you must be born again. This regeneration comes through repentance and faith in His Son Jesus Christ, Who, having been born from a virgin and having lived a perfect life, atoned for the sins of the world once and for all, and Whose body was physically resurrected 3 days later. All who realize they are a lost sinner in desperate need of a Savior, who believe in Him, His finished work on the cross, confess Him Lord, deny themselves, and follow after Him will be saved. This is what it means to believe.
John MacArthur explains it well: