Oh, Schatje, that's so sad, especially since you like writing so.
Any way you can have a couple journals; a "sloppy"/practice one and a "real" one? Doing something like Morning Pages
http://www.highlysensitivesouls.com/...rningpages.htm might help get you out of the "habit" of correcting some since they aren't allowed to be reread or anything for several weeks.
I use to be picky and want things perfect in my journals too so couldn't keep one very long because I'd "spoil" it but Morning Pages fixed that so I learned to write sideways, cross things out, do arrows to other parts of the page, etc.
That's an idea? I use a huge 11 x 14 blank book, usually spiral bound (sketch book like office supply stores have)
http://www.dickblick.com/zz118/10/ and deliberately get "messy" and write lists and all sorts of non-linear thoughts and ideas. Maybe you could use a colored pen not like what you associate writing with and that would make it feel more like "art" than writing.