Should I [17NB] tell my girlfriend [17F] that i'm cutting again?

First off, i'm sorry if this post breaks the rules due to its subject matter but I need other peoples thoughts on what I should do. I met my girlfriend in late august of last year, and we started dating around a month later. Around that time I became a year clean, and she was aware that I had a history of sh and still struggled with depression. The end of last year and all of this year have been absolute hell and just the worst time of my life, and a few days ago I relapsed because I just can't take it anymore.

I don't know if I should tell her or not because she has her own things going on and I don't want her to worry about me. I feel like I should because I don't want to keep her in the dark but at the same time I feel like that would be putting some sort of pressure on her. I already feel like a terrible partner so i'm not sure what to do because keeping her in the dark and telling her both feel like the wrong option.