You are haram, he is haram, and the whole scenario is haram. Either you get married or you fall outside the fold of Islam: your choice?
Then, there has succeeded them a posterity who have given up As-Salat (the prayers) [i.e. made their Salat (prayers) to be lost, either by not offering them or by not offering them perfectly or by not offering them in their proper fixed times, etc.] and have followed lusts. So they will be thrown in Hell.[19:59]
This act is worth punishable by Shariah Law:
The woman and the man guilty of illegal sexual intercourse, flog each of them with a hundred stripes. Let not pity withhold you in their case, in a punishment prescribed by Allah, if you believe in Allah and the Last Day. And let a party of the believers witness their punishment. (This punishment is for unmarried persons guilty of the above crime but if married persons commit it, the punishment is to stone them to death, according to Allah's Law).[24:2]
I will quote Imam Baqir (ra) for relevance to the subject:
Imam Muhammad Baqir (a.s.) describes the fornicator in detail and says that when he would be raised from his grave on the day of judgement he shall be in a horrible state.
The Imam says,
“When a fornicator will rise from his grave the stink of his body shall hurt the people. The people will know what deeds he had committed in the world. Till the Almighty Allah would order him to be thrown into the fire.”
Then Imam Baqir (a.s.) continues,
“Know that Allah has prohibited Himself the Harām things. He has also prescribed the rules and regulations of life. No one is more modest than Allah. It is His modesty that He has prohibited Fornication.”
Have you honestly studied Islam? Given a thought about studying it? If yes, then the answer should have been apparent to you before even starting a relationship. You can watch videos and even read articles and you will get the same answer.
Hazrat ‘Ali (a.s.) says:
“On the day of Qiyāma a bad smell shall be released by the order of Allah. And all the people will become restless because of it. So much so that it would be difficult to breathe. Then a caller will proclaim loudly, ‘O people of Mahshar! Do you know what this stench is?’
They would reply, “We do not know! However this stink is causing great discomfort”, then Imam (a.s.) continued,
“It is the bad smell from the sexual organs of the fornicators who died without repenting for their sins. O people, Allah curses these people, you too invoke curse upon them.” Then there will be not a single person who would not say, ‘O Allah send your curse (anger) upon these fornicators’2
The Holy Prophet (S) says:
“After me when Fornication will increase, sudden deaths will also increase.”
He also said:
“Fornication causes depravity and destitution, and because of it, populated places become deserted.”