2000 hond keeps trying to start with key off killing my battery what do i do

 

Sounds like your engine is trying to start without the key??
If that is the case then would look into new ignition switch.
And or starter relay being stuck closed.

First would be to try swapping the starter relay with another to see if that changes anything
If no change then not the relay.

Note: Ignition switch is not the same as ignition key and cylinder.
The switch is cheaper.

Good luck