DO NOT CONTINUE WHAT GOD HAS DISCONTINUED

Waiting to be married in itself is very very hard. It is both mentally and emotionally draining, but for the grace of God. 
However, the waiting that must never be condoned is hanging on a man or a dying relationship with the hope that with a little more patience, the man will change. 
The fact of the matter is we cannot make decisions on what we do not know. I say this because the fact that a person "could" change is not enough to support an ailing relationship. You don't know whether they will.
The hope that a person may grow spiritually is no reason to nurture a dying relationship. What you do not know may offer hope, but we ACT, in the moment, on what we do know.
If the decision is whether to continue with someone who continually draws you into sin—there is no decision. It may be a temporary stay or a permanent cessation, but the relationship needs SERIOUS HELP! This is the stuff of police reports—the person who is abusive but claims they "love" you. If they are drawing you into sin—THEY DO NOT LOVE YOU!
Not the way Love should LOVE, sacrificially, unselfishly.
If someone is not drawing you deeper into fellowship with the Lord, that person is a hindrance to running "the race marked out for [you]" (Heb. 12:1). If this seems harsh or exclusive—so be it. It may very well be that to live a life pleasing to the Lord you may need to be somewhat ruthless. If this is why you are still single, no apology is needed.
Some of us may have come from a broken home or an abusive childhood; you may have had or may never have had a serious relationship; you may have many unfulfilled goals and dreams. Some of us may even have it all well worked out yet feeling that we aren't worth it because we are not yet married.
Whatever “it” is in your life that you think you are missing, whatever “it” is that you think is holding you back, whatever “it” is that is your security blanket that you think may have left you incomplete, never hope that one man, just a man will fulfil all this longings. None but the Most High God.
A man without the fear of God, will add to the burdens you already have and the little hope that you are clinging unto may be taken off you. The reason many of us are left broken and shattered today is the error of placing our hope in man, a human like us, who may not even know how to sort himself out. Our youthful and single days are often burnt out chasing the creation and not the creator.
Here is the word of God:

Trust God from the bottom of your heart;
don’t try to figure out everything on your own.
Listen for God’s voice in everything you do, everywhere you go;
he’s the one who will keep you on track.
Don’t assume that you know it all.
Run to God! Run from evil!
Your body will glow with health,
your very bones will vibrate with life!
Honor God with everything you own;
give him the first and the best.
Your barns will burst,
your wine vats will brim over.
But don’t, dear friend, resent God’s discipline;
don’t sulk under his loving correction.
It’s the child he loves that God corrects;
a father’s delight is behind all this. Proverbs 3:5-12 (The Message)

THE TRULY SORTED ARE THOSE SETTLED BY JESUS CHRIST. WAIT ON HIM TO SORT YOU OUT. THOUGH HE DELAYS, HE WILL SURELY COME TO PERFECT ALL THAT CONCERNS YOU! YOUR LIFE IS NOT A GUESS WORK. GOD HAS A PLAN! COOPERATE WITH HIM.

If it is a godly man you are looking for (and I pray it is), expect the person you are dating to live up to this great charge. Call them to live up to this great charge. The truth is you may look back and thank God he hindered you. But first, if he is hindering you, you must be hindered. Accept not to forge ahead in your own strength. 
Wait on the Lord!