Or do you not know that the one who joins himself to a prostitute is one body with her? For He says, “The two shall become one flesh.”
1 Cor 6:16
"Marriage is to be held in honor among all, and the marriage bed is to be undefiled; for fornicators and adulterers God will judge."
Hebrews 13:4
And I say to you, whoever divorces his wife, except for immorality, and marries another woman commits adultery.”
Matthew 19:9
Even from that verse we know that even divorcing and marrying another except out of sexual immorality, that is adultery.
The same in this case is true. If you have sex before marriage and you do not marry that person, you are guilty of adultery.
Probably 98.9% of us are here all guilty of committing adultery. So what do we do? Repent and sin no more. Trust in the cross and stop doing it.
This is helpful.
I been in the position myself in an account of being with someone else wife.
All people have made mistakes in this area of sex ~ Thankfully like you share here is when realize the mistake of what has been wrong : such a lustfully trying to get a woman just to be with her and then leave her by and through this abusive action. The cause of harm is what has a lasting effect on the conscience of how the heart, mind, emotion feels. Some people are very lost in darkness, and have yet to come to see the light and the truth about these things when it comes down to what is to be a wife, or a husband that is provided by and through the bible as good council of information.
Thank God for the encouragement of light and goodness and mercy that helps us to change our mind, and look towards the light rather than the darkness, and being consumed by the world of darkness in which we are pulled out of and put in the kingdom of Gods Son that we may find, forgiveness, peace, mercy, joy, patience, humility, selflessness, non-judgement, and love.