I am a born again Christian and would like to date, maybe even marry a non Christian. Is this right for me to do? I have asked some people and they say it is sinful for me to do it. There are not many girls/women in the churches my age or that I would like. But I do have someone in mind she is a very nice girl and I would like to date her.

Whom you marry as a believer in Jesus Christ is the next most important decision you will make in life. (The first was trusting Jesus Christ for your salvation.) This special person should be someone to whom you give a special invitation for a very special purpose. The invitation and purpose is this: "O magnify the Lord with me, and let us exalt his name together," [Psalm 34:3O magnify the LORD with me, and let us exalt his name together.
See All...]. The invitation conveys to her (or him) that your commitment is more than just a commitment to each other but is to be a commitment to magnify and exalt the LORD Jesus Christ’s name together. It is, therefore, imperative for you to seek before the LORD the mate He has for you in this all important matter. To disregard this will only plant the seeds for a broken marriage and home.

A believer ought not yoke up with an unbeliever. This is a biblical command.

2 Corinthians 6:14-16 [14] Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? [15] And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? [16] And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.
See All... Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.

Here is the principle in God’s word that is all important.

Amos 3:3Can two walk together, except they be agreed?
See All... Can two walk together, except they be agreed?

This becomes the central pillar to support the walk of two together -----agreement. Is there, then, agreement on the issues of life? Are you agreed on Jesus Christ? It is imperative to search each other out concerning beliefs and practices. Be honest! This searching will "clear the air" and give "no uncertain sound” so that both persons may recognize whether to marry this person or not. Observe and hear the words of the LORD for the promise. Be patient. Wait on the LORD and He will provide.

Deuteronomy 12:28Observe and hear all these words which I command thee, that it may go well with thee, and with thy children after thee for ever, when thou doest that which is good and right in the sight of the LORD thy God.
See All... Observe and hear all these words which I command thee, that it may go well with thee, and with thy children after thee for ever, when thou doest that which is good and right in the sight of the Lord thy God.