Please help I really need your advice

Ok I really need help because I don’t know what to do you see I started cutting myself about 4 and a ½ months ago, only 3 of my friends know I do it and over that time Ive promised to one of my friends about 4 times that I’d try and quit but I always went back to cutting, anyway a couple of days ago I promised to one of my other friends that I would stop cutting, I did mean it when I said it to him and I was doing it partly for him because I know he hates it, he even threatened to start cutting if I didn’t stop but I also am doing it partly for me cause I really do want to change but now its 2 days later and Ive been constantly thinking about it and honestly I don’t want to quit. I don’t know what to do, do I tell my friend I don’t want to stop cutting or do I just pretend I tried but ended up going back to it?? I already feel bad for all the times I promised my friend that I’d stop and failed and even though it’s a different friend I promised this to I still feel bad for changing my mind. Please help I don’t know if I should tell him or just lie????? Any advice would be greatly appreciated cause Im really at a lose right now Thanks

Hey i used to cut but i haven't for 2 years now and it was hard but i did it!
I took up kickboxing and when I'm cross i just punch and kick the bag and I feel better!
Also you have to want to stop for yourselfand it will take time. Also you need to look at what made you start and deal with that issue if you really want to stop whether it was an event or an emotion! If you want to or need to talk I'm here for you, my email is phoenix_shadowed@hotmail.com
Goodluck and I hope in some way this helped you!
Love
xoxox