I hadn’t self harmed in almost 2 years because of my girlfriend but we broke up a week ago and today I did it for the first time in a while

My girlfriend was good and bad for me in lots of different ways, but one of the ways she really helped me was by helping me to not cut. Even when I really wanted to I felt like I couldn’t because she would find out and be disappointed in me, which forced me to do something else, usually talk to her. Ever since we broke up I have been having very bad thoughts and usually I would talk to my best friend but that was her. I don’t feel like there’s anyone I can talk to about this besides her but I don’t want to burden her with my issues and make her feel guilty in any way. Please give me some advice.