This is perhaps an age old question that many hold a very one-sided opinion on. Some say it’s not Biblical; we must be equally yolked and others combat it saying perhaps we are called into their life to bring them to Christ.
Equal yolks is in reference to marriage, and the point of dating is to marry so the question to ask yourself is why do you want to be in a relationship with that person? There is an ache inside that you cannot fill with him/her. If they are not a believer, what makes you think you can change them? God changes hearts. Also ask yourself why you want to be with a person whose viewpoints you need to change before you can date them.
Now I get it, maybe you really do think that you’re called to save them and who’s to tell you that you won’t be the one to lead them to the Cross? From personal experience I can say that this is not the case most of the time.
For what it’s worth, I spent nearly a year of my life with someone who was not a Christian, and I truly believed I was in her life to be a witness, a light. You must understand that only one person will be the influence in the relationship. Without me even noticing, she influenced the way I thought about life rather than the other way around.
When two beliefs clash against each other, that’s where the separation begins, and it only grows from there. The relationship tends to end due to values not lining up.
If Jesus is the closest one to your heart, the most important thing to you, then why do you want to be with someone whose treasure isn’t the Lord? I know for me it came down to loneliness and a crippling depression that I thought would be cured through any sort of companionship. Being with someone never filled the hole that Christ is meant to fill. Instead of waiting for the right person on God’s time I grew impatient and took it into my own hands. Wait upon the Lord. The time will come.
‘Every way of a man is right in his own eyes, but the Lord weighs the heart’ (Proverbs 21:2)