What religion, if i may ask?
I think maybe he's really bought into it and is worried about your "eternal soul"? He's likely doing this out of concern for you if you're very close friends. Maybe ask him if he thinks what he's doing is convincing you. That if he thinks his acting this way would move you closer to his religion, or cause you to be suspicious of it? Try to help him see that his actions are not making you like his religion any better, and that you're a little worried about him.
Another approach, the one I take when someone tries to convert me, is to tell them why i don't believe. Which is that there is no evidence. And if they came up with evidence I would consider it. They usually can't come up with evidence and would drop it.
I think maybe he's really bought into it and is worried about your "eternal soul"? He's likely doing this out of concern for you if you're very close friends. Maybe ask him if he thinks what he's doing is convincing you. That if he thinks his acting this way would move you closer to his religion, or cause you to be suspicious of it? Try to help him see that his actions are not making you like his religion any better, and that you're a little worried about him.
Another approach, the one I take when someone tries to convert me, is to tell them why i don't believe. Which is that there is no evidence. And if they came up with evidence I would consider it. They usually can't come up with evidence and would drop it.