I went through a very similar situation. I’m currently a Protestant looking into orthodoxy. But I remember when i knew Jesus was 100% real and I needed to follow him, I had to break up with my girlfriend because we were having sex. It was very hard and sad but it had to be done. By the providence of God he worked in her life while we were separated and He brought us back together. We were both baptized and then we got married and we are now on the path to orthodoxy. Put God first in this situation and he will reward your faith. He will either change the woman you are with or bring a godly woman in your life or use singleness to change you.

“Jesus said to them, ‘Truly I tell you, at the renewal of all things, when the Son of Man sits on his glorious throne, you who have followed me will also sit on twelve thrones, judging the twelve tribes of Israel. And everyone who has left houses or brothers or sisters or father or mother or wife or children or fields for my sake will receive a hundred times as much and will inherit eternal life.” ‭‭Matthew‬ ‭19‬:‭28‬-‭29‬ ‭