i know that this is not easy to say. but we know that it is not the will of God for us to stay together and yet be unmarried. Marriage is an institution set by God, so that two people will cleave together and henceforth will become one person. Do both of you want to become one person out of God's institution, which is recognised by God?
we need to conquer so many things in our lives and God has always been gracious and patient with us. He does not condemn us but He always point us to His righteousness, which is not through our works. But does that mean that we deliberately live in sin? No, my dear ... if both of you are Christians, and if you want to commit to each other, why not talk to God about it and get married?
24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
25 And they were both naked, the man and his wife, and were not ashamed.
With the right values, and with God's grace, both of you should be able to make marriage work. Come out of darkness and come into the light. Let not the devil accuse you any more or your heart condemn you.
[1 John 3:20]
For if our heart condemn us, God is greater than our heart, and knoweth all things.
hope this helps. Christ has conquered all so that we may be conquerors in Him. It is possible for us to honour God and honour ourselves. God has instituted marriage to bring you the honour and respect of staying together.