Me and my friend were working in lab and my friend accidentally broke the equipment that we were working with. We were so worried about telling the professor especially that we were in open lab and there was no one there except me, my partner, and 2 other friends. Anyway, we got glue and put the broken part together. Now I feel so guilty for not telling anyone about it. It is also somewhat considered my responsibility because we were working with the equipment together when it broke.( but more so his than mine because it was his turn to use it when it broke). When he was using it, I had a feeling that it might break because he wasn't really using it the correct way but i didn't say anything because I though that he had it under control. Anyway, after it broke I tried telling my friend that the right thing to do is to tell someone about it and to take responsibility but he didn't want to do that. Anyway, now i don't know what to do. Can I just confess about it or do i have to go tell the professor about it? please advice me and thanks.