I am in an on and off long-term relationship with a girl who is really hoping I propose to her soon. We we're together for a few year then broke up and got back together again a few years later. There were two instances of infidelity on her part (I am sure I share in at least some of the blame for my lack of attention to her) in the past but she has reluctantly expressed her remorse for those events and has assured me that something like that will never happen again. She was saved many years ago in a Bible-believing church her mom and her attended but both long since stopped attending church. She now holds a "can't believe that there is only one way to heaven" and "how could a loving God condem all those in other religions" view on God and Christianity. I am not really sure what to make of all of this.
Corinthians 6:14 says:
Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
But since she was saved earlier in life, would she be considered counted among the unbelievers? John 10:27-29 says:
27. My sheep hear my voice, and I know them, and they follow me:
28. And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
29. My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.
I could really use some advice here. I have prayed long and hard over this topic and feel lacking in the wisdom I need to deal with this kind of decision.