Re: How to tell people I love I used to...
Well first things first, you can get rid of the scars.
There are oils and things that can get rid of them. I'm not sure which ones they are, but if you look around I'm sure you'll find them.
With your boyfriend, if he truly wants to be with you, it won't make him leave. I told my boyfriend a few months into the relationship, because I was still doing it then. And over 3 years later, his still here.
I am sure if you find the right time to talk about it, your boyfriend will accept it as part of your past, and if he does fly off the handle about it, just give him time to calm down. I'm sure things will be okay.
If you want to tell your bestfriend, perhaps send her an e-mail or something? I am sure she wouldn't tell anyone else, and if you make it very clearly that self harming is not an experience you want to repeat, then that would ease her miind about worrying or anything.
With whatever you do, and however you tell them, I wish you luck.
"The greatest mistake you can make in life is to continually be afraid you will make one." - Elbert Hubbard