Are you sure of your relationship with God? You can be if you follow God's instructions on how to have a right relationship with Him. Here is what to do:
Admit that you have rebelled by not following God's perfect law. (romans 3:23; I John 1:9)
Believe that Jesus is God's only Son, and that His death and resurrection is the only possible payment for your rebellion. (John 3:16; Romans 3:23-26)
Ask Jesus to take the penalty for your rebellious actions (Sins) so that you can be declared right with God. (Romans 10:9; John 1:12)
Commit to place God first in your life by studying and obeying God's Truth in the Holy Bible. (II Timothy 3:16-17)
In order to have a right relationship with God, pray through the steps above and then commit yourself to grow in your new christian faith by daily talking to God in Prayer and reading the Bible. Then get involved in a good Bible teaching Church.