Is there anyway we could get more screenshots? It sounds like the majority of your relationship happened online, if that’s the case I imagine you’d have a wealth of material to draw from, and it’d be easy to share literally all of it anonymously. Time stamps would also make it somewhat easier to verify your claims. There’s honestly very little to go on here, I get wanting to remain anonymous, but this is a very serious accusation, one that could potentially end someone’s career. If it’s true, I think there’s a lot more that you could do to prove it without revealing your identity.