<human>: So me (m19) and her (f20) broke up tonight after 2.5 years together. The conversation started with her admitting to hooking up with someone at a party and feeling really horrible about it. 

There were a lot of other reasons for the break up, but I was too distraught and cowardly to admit to her that I had also cheated in a similar way months before. This girl meant the world to me, and I still care about her. I know she probably feels like the bad guy and that's not fair when I did the exact same thing but didn't have the balls to tell her. It doesn't feel fair to let her believe she's the only one that cheated and I'm some saint that she betrayed. 

Is there any way I can tell her or something to make it easier on her?

Summarize the given text in a few sentences.
<bot>: we broke up, she admitted to hooking up with someone else, i want to come clean about doing the same thing so she doesn't feel like shit. What do?