I had an affair with my girlfriend's best friend. She promised me to keep a secret, but she sent us a photo the other day.

You are dead now, and your girlfriend won't forgive you. Her best friend is a schemer, so you may not be able to deal with her. If you don't give up, you can wait for your girlfriend to calm down and apologize to her. I hope she can forgive you. After all, you love her. If she still doesn't forgive you, you have to take care of yourself.

good luck