Why does the MC dude keep meeting Hanamitsuji? Half of her lines to him are insults, and the other half is pretty much indirect insults questioning his way of life and choices. She keeps nagging him to get friends, but she doesn't help him with that, nor does she even give any concrete advice. And then if he actually tries something, she comes back to criticise and insult him some more. That's some attitude from someone whose life he saved. And no, she didn't return the favour by saving his life. It was the god who did it, on a whim.
Nanamura keeps saying he doesn't need or want friends, so he doesn't need Hanamitsuji's company either. He's a lone wolf chuuni. His only reason for befriending someone would be to talk about his own intrests, which mean the other person would need to be a romcom light novel fan as well. He doesn't know any, nor is he interested in looking for one. So, why on Earth does he agree to meet Hanamitsuji time after time? He even ignores her chat messages, so he should just ignore her entirely, while he is at it.