I understand completely. I cut a few weeks ago after a long time without having to.

I suggest you talk to your girlfriend. I'm sure she would hate it if you kept it from her. I know my relationship has struggled because of my self-harming, but my boyfriend thanks me for telling him every time I do it. And he doesn't pressure me to stop either (if that's what you're worried about).

I think you should reach out to her, she should be there for you and understanding.

Best of luck and feel free to message me if you need to talk and don't want to "bother" your other friends.