Gotta write this fast but basically the site keeps logging me out for an unknown reason. Not a password problem and I've tried clearing cookies.

The only way you can get logged out is if your Danbooru cookies get cleared. Make sure there's nothing in your browser that could be clearing your cookies.

There is a known issue where if you visit https://testbooru.donmai.us your Danbooru cookies will get cleared (so don't go there unless you want to get logged out). If you happen to be testing something on Testbooru, that might be it.

Do you have any browser add-ons for security or cookie management installed? Some add-ons offer a feature to delete “unused” session cookies after a few minutes. I use uMatrix and always got logged out when following links from local files until I allowed cookies for local files as a workaround.