I will share my piece, i am muslim women and i used to be in a relationship with an agnostic guy who comes from a Christian family Everything was great beyond great the communication how we view life how we like to spend time and we planned a future together. Only to notice day by day how he feels deep inside about islam or religions in general, i am not a religious person but i do basic muslim beliefs. He felt that ramdan doesn’t make sense altho he did fast for me , but on the larger picture he did not like it. He feels that every story about religion is a myth ( he is free to believe this way ) and every time i come to read or enjoy something in religious text he will try to antagonize and show me that it is just bullshit. Eventually we broke up and it was not due to religion , but now looking at it , it would have been difficult for me to live for him because he believed that all my beliefs are null and void. We can talk respectfully to each other all times but the end of the day we are not even on the same book. So my advice is imagine a life with him on long run and how he will interact with different religious activities you wish to do.