There is nothing that fits this description, that's why so many people have been here for years. Ctb is one of the toughest things to do, and it takes planning and luck to work- over 95% of attempts fail. Recovering if at all possible is easier sometimes. One in a while someone gets lucky with a quick attempt, but it is are and usually has serious risks. You'll need to do your own research to see what might work for you- but easy and discrete seems almost impossible. Cutting works less than 2% of the time, what will likely happen if you try this is a bad scar that everyone sees plus an involuntary hospitalization which in most cases makes things worse. I wish it was easy to leave, but it's one of the toughest things to do.