“get threads out of my unread replies without deleting”
I’m sorry – its late… what do you mean?
You obviously know what "unread replies" means. Once you post in a thread, every time it is updated, you'll have it there. But if the thread gets boring or just wanted to poke your head in once, it keeps coming up in the unread replies and takes up space. To stop this, you can delete your own post(s) on that thread, and it won't be "replies" anymore.