I'm religious and conservative but he isn't. Why is he even interested in pursuing me?

We aren't dating but there is an obvious attraction. His entire family, especially his mom, really likes me and they all treat me like one of their own. They bring me gifts and his mom asked to neet my mom over Skype.

They always talk about him to me. From what I've learned we would probably get on like a housefire but there's a problem.

We are from the same religion but he doesn't practice at all while I am a strict adherent. I just confused as to what he sees in me.
I'm religious and conservative but he isn't. Why is he even interested in pursuing me?
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