Seeking Advice on a Delicate Situation

Salam, everyone. I'm a Muslimah who had to turn down a man who is Catholic, as I didn't feel it was right to pursue something with little future unless he embraced Islam. Initially, he was hesitant to consider converting, out of respect for his family's faith, even though he isn't very practicing himself. Lately, after many discussions, he's expressed a desire to learn about Islam, and I recommended he read an English translation of the Quran. Now I'm feeling torn because I understand that embracing Islam should be for the sake of Allah alone, not for love or marriage. Is it inappropriate for me to keep communicating with him while he's learning? How can I discern if his curiosity about Islam is genuine or simply driven by his affection for me? Jazakum Allahu khayran for any guidance.