<human>: I finished with my ex gf a few months ago due to arguments and things said. She has started seeing a new guy and since I haven't moved on, I felt jealous.

In a fit of jealousy I set up a fake facebook profile using pictures of a hot blonde I know and have been flirting with him online. I'm surprised at how successful this endeavour has been. We are now engaging in very sexual talk and he has said he wants to meet me and sleep with me.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I've catfished my ex gf's new bf with fake facebook profile and the flirty/sexual messages he sends me suggest he's a cheating bastard. Should I tell her?