What's the best way to tell a friend to FUCK OFF?

Get off my case, yes you may be the boyfriend of one of my good friends, but that doesn't give you the fucking right to interfere with my friendship with her. I don't expect everything I say to her to be kept from you because I tell my other half everything as well, but I don't have to fucking answer and justify to you anything I tell her.

It's amazing how you've made it all about you, you, you. You're one of the most self-absorbed, unself-aware individuals I've ever had the misfortune to come across, bully for me.

Don't come running to me anymore. I'm sorry, but I'm her friend first before I am yours. Yes, it's inevitable that I have to take sides, isn't it? And it certainly won't be yours.