When wise people around you are raising concerns about the relationship.
We believe there are three ways God most often speaks: His Word, His Spirit, and His people.
The counsel of godly men or women in our lives is a provision from God to protect us and guide us (Proverbs ). If you are not on the same page about who will be your Master (Jesus), then you need to get out now. Followers of Christ are to minister to non-believers, not marry them. If you have been perpetually dating someone for 12 years, it may be time to move on.
They can help us see things that we miss when we are blinded by emotions. Missionary dating is a bad idea; if they are not following Christ now, chances are they won’t be in marriage. As believers in Christ, dating should be a path, that leads to a promise, that leads to a lifelong pursuit (marriage).
Ultimately, remember, you're not the point of the relationship—Jesus is.