I cheated on my boyfriend with his roommate. It was amazing but the guilt is awful.
Do you think your relationship will be affected in the future?
It doesn't matter, I was going to dump him after that night anyway.
I understand that you were planning on breaking up with your boyfriend, but you shouldn't have been with his roommate while you were still in the relationship. If you move forward with a relationship with his roommate, the roommate will never be able to trust you since he knows your past of cheating.
It wasn't a big deal, I was planning on dumping him too.
As you said though, you still feel tremendous guilt. Next time, try to remember how you feel and avoid cheating.