Disadvantages of Haram relationships
Here are some reasons why haram relationships are extremely dangerous in this modern age and you should stay away from them.
Haram relationship leads to zina - In Quran, Allah says , "Do not commit zina , Indeed it is an immorality and an evil way". Many scholars interpretate the verse in a emphasizing way. You should not even go near it. The devil never calls anyone to zina (fornication or adultery) directly, the devil attracts step by step. A gaze turns into a talk, which then keeps on increasing in indecency to the point people commit minor or major zina. The most indecent act you can do to yourself along with destroying someone else's life and hereafter too. So lower your gaze and have boundaries so that God helps you stay protected. There is wisdom in God's laws and its for your own good.
Pre-martial relationships are nothing but seeking pleasure - When you are in a haram relationship, the dopamine baseline in your brain is increasing from pleasure and the neural pathways is linking the validation seeking activity to achieve pleasure. You are letting your brain experience pleasure from this person whom you are not married to. When it will stop from one person, you will want more to the point you lose control and move to dog like humans who prey on validation seekers.
It destroys marriage life - Someone whos been a relationship and broken, then again then broken then again then broken. Tell what goodness they will feel when they will be married. Pre-marital relationship is based on fulfilling validation and attention alone and a marriage life comes with real responsibilities. At some time, an average number of partner a person had before marriage was 3.5 in U.S. . That is why we have so many divorces nowadays.
If you really care about the other person, don't involve them in haram - If you genuinely care about the human being, there is no sense in being in a haram relationshipthe because when they do haram they may go to hell. Why do you want to be the reason for the person you like to go to hell. A good person will ask for marriage or will walk away. That is the person who actually wants good of you and others, not the person who says so but actually calls you to evil.
Would you want it for your own mother , daughter or sister? - A young man came to the Prophet ﷺ and said, "O Messenger of Allah, give me permission to commit zina." The people turned to rebuke him, saying, "Quiet! Quiet!" But the Prophet said, "Come here." The young man came close, and the Prophet told him to sit down. He then asked, "Would you like that for your mother?" The man said, "No, by Allah, may I be sacrificed for you." The Prophet said, "Neither would people like it for their mothers." "Would you like that for your daughter?" "No, by Allah, may I be sacrificed for you." "Neither would people like it for their daughters." "Would you like that for your sister?" "No, by Allah, may I be sacrificed for you." "Neither would people like it for their sisters." "Would you like that for your paternal aunt?" "No, by Allah, may I be sacrificed for you." "Neither would people like it for their paternal aunts." The Prophet then placed his hand on the young man and prayed: "O Allah, forgive his sins, purify his heart, and guard his chastity." After that, Abu Umamah reported, the young man never inclined toward that temptation again.
You destroy your self respect - In a pre-marital relationship, you lose your self respect. When a human being is being pleased , its natural tendency that they get used to it and then use it to their own advantages. This does not happens in marriage because its a commitment, but in haram relationships the other person has a free hand. People are very brutal in shaming others when they realize someone is worshipping them. They become mini-gods when praised enough and literally use up the other person as much as they can, all this in a situation when they can walk away any day without any legal or religious obligations. In case the haram relationship ends up in a marriage, they end up suffering because they have already lost self respect.
The other person shows a fake side - In every single relationship, whatever the person appears to be is fake. Whenever a human being is in a haram relationship or wants to impress someone, they show their best side, and behave accordingly. They will try their best to win you without telling their bad habits in case they have some. The other person is unaware because they haven't lived with them and are seeing this fake side. When people marry, they realize this is a completely different person because the real manners and behavior comes out. So its kind of a game of fooling each other. And you have to spend your whole remaining life with the person you are being married to. Marrying someone thinking you will never get over or happier is a false assumption in itself.
Pre-marital relationship can cause post-marital relationship - Dopamine is a chemical which is released the most in the process of achieving something. When you finally reach your dopamine baseline and get married, you are not going to get that same amount of dopamine again. Now , in order to get that same amount of dopamine, you will seek it elsewhere. Due to the neural pathways, there are high chances you may fall into post-marital relationship ( Ma'adhallah / God Forbid ) and it is one of the greatest sins, a person who commits post-marital relationship. We all know the punishment of adultery.