I messed up and cheated on my boyfriend... Help :(?

Im not trying to be mean but I believe there is nothing you can do. Sleeping with someone is the most strongest sexual act you can do, and it cannot be undone. Im sorry but thats really serious and you'll have to just accept the fact that your boyfriend might dump you. Im sorry I know I didnt help at all but its true, what would you feel like if you had a boyfriend like romeo who your crazy about and he just humped a girl regardless of how you care? Well...What you might be able to do is tell him that it was an accident and tell him how everything happened and promise him you wont ever do it again, and dont you need to make mistakes to learn from them? Im only 13 so idk much about relationships at all...But I hope I helped! Im the only 13 year old in school whos deep and knows alot about love relationships and phychology.