I gagged and bent over the bushes to dry heave but nearly fell over from being light-headed. I didn’t know where to go. My house was no longer a refuge.

Bethany was a stranger to me now. I couldn’t understand how someone who loved me could hurt me like she had. She had to know it would kill me. Kill us. Our bestie connection was severed and I couldn’t imagine how we could ever be friends again.

When we discussed bringing Mark into our relationship, I put it in her hands. I told her straight up that it was her call. I told her she was my girlfriend and we...