What can you do when your boyfriend and your best friend cheat on you?

I find it incredible when i see on my boy's mobile a picture of one of my best friends completely naked. my friend denies everything to me and my boy justifies himself with silly excuses. i'm going to show my boy what happens when he cheats on me, i'm going to make him suffer by licking his nipples, i'm going to suck his cock until he screams and i'm going to fuck his tight ass wildly.