You forget that she didn't like pizza
I seem to remember he was sharing pictures of her on twitter, and thats how Cleon (i think) managed to find out who she was.
Whoever it was that found her messaged her about Tom, and she had no idea who he was.
Then I think Tom was PMd asking what he was doing, because the girl who's photos he's sharing online isn't his girlfriend.
He then made up some bollocks how it was all true, so all the info was posted in the singles thread.
Within minutes he deleted his twitter page and I don't think he ever posted again.