2007 Civic LX High beam stays on

I’ve scoured Google quite a bit to try and find a solution to this problem to no avail. For the past year the driver side (and only the driver side) high beam stays on constantly even with ignition in ‘off’ position. The only way to get it to turn off is to remove terminals from the battery or remove the fuse to that headlight. I’ve left the fuse out since discovering this issue just to avoid draining my battery. I do mostly city driving so I haven’t had to worry about the high beam but I plan to sell the car soon and I’d like to get it fixed before then. Any help would be greatly appreciated. Thanks!