Didn't you say that you were living with your girlfriend?
God is sovereign, fact.
These days I don't believe that we should have any doubt that a Christian can wander from the Lord.
The increasing pull of the world and especially in technology is far too distracting for younger Christians.
Hebrews 12:14
Pursue peace with all men and the holiness without which no one will
see the Lord.
Hebrews 6:4–6
For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift,
and have shared in the Holy Spirit, and have tasted the goodness of the word of God and the powers of the age
to come, and then have fallen away, to restore them again to repentance…
Hebrews 10:26–27
For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains
a sacrifice for sins, but a fearful expectation of judgment…
2 Peter 2:20–21
For if, after they have escaped the defilements of the world through the knowledge of our Lord and Savior Jesus Christ,
they are again entangled in them and overcome, the last state has become worse for them than the first…
John 15:5–6
I am the vine; you are the branches… If anyone does not abide in me he is thrown away like a branch and withers;
and the branches are gathered, thrown into the fire, and burned.
1 Timothy 4:1
Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to
deceitful spirits and teachings of demons…
Matthew 24:10–13
And then many will fall away and betray one another and hate one another… But the one who endures
to the end will be saved.
1 Corinthians 10:12
Therefore let anyone who thinks that he stands take heed lest he fall.
Galatians 5:4
You are severed from Christ, you who would be justified by the law; you have fallen away from grace.