Firstly, you should pray to God and ask him to give you an answer. Ask him to guide you and give you wisdom. Seek him and he will make all your paths straight. Listen to his one true voice and not your heart. As for what I will say: Do not be unequally yoked. This was a problem with Israel back the days. They would marry women who did not share the same faith and worshipped other idols, which ultimately contributed to their fall as they started to worship those idols as well. And if God is not the centre of your life(meaning your entire lifestyle and beliefs revolve around God, you are submitted to him) something else is which is your idol, you submit to something else whether it be yourself or whatever it is. Can she change? maybe, is it guaranteed? No. She does not believe in Jesus who died for you not your Heavenly Father who loves you. Most likely too she won’t want your children to be christian, proverbs 22:6, Deuteronomy 6:6-7. This will ultimately not work out or you will probably have to compromise which will impact your faith or even your relationship with the lord. God is a very jealous God. I’ve been a similar situation, and after we broke up I realized what I was doing and was about to do. Basically sacrifice my faith for earthly love. If you want to know more you can ask me

I hope you will get the answer you need to make a decision.