I have been cheated by my Boyfriend

He told me he was just grabbing drinks with the guys. I stayed home.Around 1 a.m., his friend posted a blurry story: bodies on the dance floor. I saw him in the background, dancing close with some girl in a black top I didn’t recognize. They looked too comfortable.
He came home at 4 a.m, smelling like perfume and smoke. Said he lost track of time. When I checked his phone later while he slept, there were deleted messages and a photo of her kissing his neck in the club bathroom.Just some random girl. One night. Everything else was the same old lies.

Five years of him controlling everything, including shutting down my fantasy of posting NSFW anonymously—just once—for the thrill of flirty comments and attention. He always said it was too risky, that I was “his.”
Now I’m free. I keep thinking about posting nudes on Reddit. Should I do it?