You're probably not falling out of love with coding. You're falling out of love with having to unremember a lot of the things you've learned and replace them with new, unfamiliar things that many times, contradict what you already know.

I started out programming in RPG III on an IBM AS/400, a mini computer. Then had to unremember a lot of that stuff and move onto fat client-server architecture and RDBMSs (visual basic, oracle). Then had to unremember a lot of that stuff and move onto N-tier. (C#, application servers, MS-SQL) Then had to unremember a lot of that stuff and move onto the internet stacks (HTML, CSS , XML, Javascript and so many damn frameworks i cant even count at this point) now, unremembering a lot of that stuff so I can go serverless over at AWS.

try coding in the language/stack you are most comfortable and knowledgable in (even if it's old and out of date) and see if that doesn't rekindle the passion. If it doesn't, then its pre-sales tech support for you my friend.