Something is causing my battery to drain

Hello,

Sounds like you have excessive parasitic draw (current drain) on the battery.
All electrical circuits with a battery will have some amount of parasitic draw, however it can become excessive due to any number of faulty components. Like it could be a glove box light staying on or a malfunctioning window switch etc.

In order to find out what is causing the draw you will have to use a multimeter and check the current draw on the battery, as you remove fuses for different circuits.
This vehicle should have less than 25 milliamps of parasitic draw.
Take a look at this video, it shows exactly what to do:

https://youtu.be/z5F7WpgjaRs

https://www.2carpros.com/articles/car-battery-dead-overnight

Please let me know if you have any questions.
Thank you.