["I accidentally sent a text about my friend to that friend instead of my cousin who I meant to send it to! It wasn't mean but it wasn't necessarily nice either. I feel bad.", "That's embarassing.  What was their reaction?", 'No reply... I think shes just going to pretend it never happened, which is good with me!']
Pretend with her.  Maybe it's best to act like it didn't happen.
I accidentally sent a text about my friend to that friend instead of my cousin who I meant to send it to! It wasn't mean but it wasn't necessarily nice either. I feel bad.