THIS IS THE BEST DESCRIPTION EVER.

Sorry for the capslock attack. But I get a mental "line" too... Only it connects things. Like when I'm in the car, the line curves over each car & I get upset if it doesn't touch back down in the exact middle between two cars. Or sometimes I start to connect it between trees, street signs, or zigzagging it between the directions on the roads perpendicular to me.

FINALLY. Someone knows at least something similar to what I deal with. Well, not as much as I used to thankfully... It's lessened significantly in the past year. Hopefully yours goes away soon!