I do not believe that a true Christian like you can fall away. why?
A true believer will remain in Christ and Christ in him. So I am not sure what your trying to get at here? But what you said is merely what most Christians believe and I believe also. Jesus said:Remain in me and I in you, if a person does not remain in Christ he must not have the Holy Spirit. And as I stated earlier neither will he bring forth fruit but is as a withered branch which is eventually cast into the fire.
Ephesians 4:30: “And grieve not the Holy Spirit of God, whereby ye are sealed unto the day of redemption.”
I hope we have a better understanding now
God Bless!