Why would I hate his smell now?

When I met my boyfriend, I found his scent irresistible. It turned me on so much. Everything felt wonderful

But 5 months in, I get annoyed a lot with things he says and his lack of effort and criticism. He acts like a child

And I can’t stand his smell anymore, I just want to pull away when he tried to kiss me. I can only describe his smell as earwax. Not sure why this is. I don’t even enjoy kissing him anymore