Thanks for reaching out tmeyer2000,
It sounds like you're having trouble connecting your Bluetooth mouse to your MacBook Air. We can help.
First, since your Bluetooth keyboard is working, we want to make sure the mouse is able to connect with a different device. If it can, we can check with the manufacturer to see if it has any reset options that may correct the behavior. If it cannot connect with another device, you may need to replace the mouse.
If needed, you can connect with Apple directly using either Get Support or if you're in a region without direct support options, you can also Contact Apple for support and service.
Hope that helps.
Take care.