u/Civil-Tumbleweed-804

I did something bad and feel terrible about it. It has been almost a year and I think reaching out and saying sorry after so long would just make things worse. Currently no one knows, but if they did my family and friends would reject me and I would lose everything. What do I do? The guilt I feel is deserved, but I cant shake the feeling that I am a fraud and impostor. My friends and family think me as kind and good person, but if they knew that reality would shatter. I feel stuck... fuck me.