I just went and made a big mistake.

Without really thinking how this was going to make me feel, I found out how my ex proposed to his current gf.

Why the fuck would I have gone there?  

And to be clear, I know if it had been me, he'd be fucking around on me the same way he's tried to fuck around on her WITH me. But still, it was information I didn't want or need...and now I can't not know it.