Already dating an unbeliever
God will help you through it and in the future if you date only Christians you will find the one right for you in God's will.
You can continue to pray for your friend and you should be honest with him and tell him why and that you were wrong. The Bible says a lot of things that aren't relevant in todays society(slavery, stoning children, etc.). God loves all of his children equally and would never want to come between love.
Soo many people take the bible too literally and i dont believe it was meant that way. there are some parts of the bible that says women are not allowed to speak in the church.
My best friend let her boyfriend sell weed to her friends.Seek God's face not his blessing and the rest will take care of itself.To someone in this situation:1Corinthians -15 does not 'trump' 2Corinthians -18.If a person does not put ones trust in the Lord, you can not expect to see God's influence in his / her life.Also, Romans -, "As it is written, There is none righteous, no, not one"... If he would without leading him to Christ, he violates Christ!