I hope you are reading this because you want to be sure or you want to know if i know how to get there.
I believe the answer is if we answer we really love Jesus. The thief on the cross was promised paradise because he prayed Lord remember me when you come into your kingdom. Peter was asked if he love Jesus by Jesus Himself.Mary love Jesus.
How can we say we love Jesus ? When we love His words and when we obey His commands. Many sinners came to Jesus like Matthew the tax collector or ex-tax collector, Zaccheus, Mary Magdalene, Saul who later became Paul.
Another way to prove we love Jesus is when we love who Jesus loves.
Do our actions show we love Jesus ?
Is this salvation by works ? it is salvation by love which came from God's grace or mercy which is God's gift to us. In Biblical words it is salvation by grace.
But how can we love Jesus and love like Him ? Repent of our sins, deny ourselves, take up our cross and follow Jesus. I believe this we can do when we receive God's gift to us through the Holy Spirit.