Would you like to know that you are a child of God and going to Heaven? There are four things that you must do  to know that you have eternal life.

1. Know that you are a sinner. Have you ever sinned? Perhaps you have said that you have never committed adultery, stolen, or killed another human being as found in the Ten Commandments. Actually Jesus Christ has said that if you have hated another it is murder in the heart. He said if you have looked with lust upon another it is the same as adultery. Everyone has sinned and is a sinner.

Romans 3:23
²³ for all have sinned and fall short of the glory of God,
 
2. Realize that sin has its consequences. The punishment for sin is spiritual death. Spiritual death means to be separated from God. Since we are all sinners, we all are spiritually dead and estranged from God.

Romans 6:23 (NKJV)
²³ For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.

3. Acknowledge that God has loved you so much that Jesus has come into this world to die for you and to pay the debt of sin that every one of us owes. It could not be earned because it was so great. The only way was through the gift of God's Son, Jesus Christ, in dying for us upon the cross.

Romans 5:8 (NKJV)
⁸ But God demonstrates His own love toward us, in that while we were still sinners, Christ died for us. 

4. Believe on the Lord Jesus Christ. Confess that we have failed Him and ask Him to come into our hearts, believing He died and was raised from the dead for our sins.

Romans 10:9-10 (NKJV)
⁹ that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. ¹⁰ For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. 

Why don't you pray and ask Him to come into your heart right now? Here is a prayer that you can pray. If you pray it and really mean it with all of your heart, Jesus Christ will come and dwell within you heart and life.

Dear Father in Heaven, I admit that I am a sinner and have failed you. I could never do enough good works to earn it, but you have freely given Your Son for my sins. Thank You, for the great gift of Your Son who has died for my sins. Right now, I confess with my mouth the Lord Jesus Christ and I believe that He has risen from the dead. Please come into my heart and forgive me of all of my sins. Thank You for giving me eternal life through Your Son. In Jesus/ Name, Amen. 

AFFIRMATION OF FAITH
I believe in God the Father Almighty, maker of heaven and earth;
and in Jesus Christ, His only Son our Lord;
who was conceived of the Holy Spirit, born of the virgin Mary,
suffered under Pontius Pilate, was crucified, dead and buried;
the third day he rose from the dead; he ascended into heaven,
and sitteth at the right hand of God the Father Almighty;
from thence he shall come to judge the quick and the dead.
I believe in the Holy Spirit, the holy catholic church,
the communion of saints, the forgiveness of sins,
the resurrection of the body, and the life everlasting.
Amen