I'm assuming that you're a Christian, I can't find where it says you are. First of all, you must date a Christian woman with the realization that she could be your future wife. You should not date a woman before you find out what kind of relationship she has with our Savior Jesus Christ.
Questions like, are you a Christian? How long have you been a Believer? where do you go to church? How often to you go to church? Can I go to your church with you? By going to her church with her you can discover if she's popular, has fellowship with other Believers and if they seem grounded.
Any woman who loves the Lord will not be offended at these questions and requests. They will know that you are very serious about a godly relationship. Do not have sex with the woman you date. That weakens every future relationship. If a woman wants to jump into the sack with you, she's not God's choice for you.
God will signal you as to the right one for you if she wants to wait until your wedding night before sex. You need a pure relationship before God. When you court a woman, there is a process where each of you investigate all your likes and dislikes. You two will discuss each one's "baggage" honestly. You don't want any surprises later on in the marriage. That will tell, that either one was not honest, while you were courting. Honesty and communication are vital for future relationships.
You want God's choice for your future wife? Do it God's way and you'll find her and your marriage will last until death do you part.