Male, 19, haven't figured this last one out yet.
In about 24 hours, I will not have cut for a full year. Still have a lot of razors and bandages though, just in case. It's been really difficult some days, so I fully understand why you would relapse. I still genuinely miss it some days.
For me it was about control, clarity (really like how you put that, hope you don't mind me using it myself), self-loathing, and a couple of times a kind of twisted way to get back at people I cared about I felt angry with.
It took therapy, the threat of my parents finding out, and hurting my friends to make me seriously consider quitting, and even after all that it took a few months before I'd actually 'stopped' for two months. Then a couple of months sorta one and off, before I'd finally really quit (at least, as far as I know).
I am actually looking forward to being able to tell people that I'm one year 'clean' tomorrow, especially the ones I hurt the most.
The point is (I think, took a while to type this for various reasons) that you never know when you've actually 'permanently' quit, the only thing you can try (and succeed at, as opposed to 'quitting forever') is cutting less and less. Gradually lessen and lessen your dependence and its presence in your consciousness. Looking back (and ahead), that's what's working for me...
...although this is still advice from a stranger on the internet, and you should never trust those. If a professional tells you something completely different from what I just told you, take his or her advice instead.
And thank you for being so open! Telling your story made it easier to share mine (can't speak for anyone else), and talking about something almost never hurts. Who knows: maybe a few people wound up a bit more informed and well-rounded.