<human>: Give me the gist of the text in a nutshell

Not too long ago I met this guy on reddit. Our conversations were always very casual (on my side at least, hes always been very flirty). A few days ago he reached out to me again on Google chat. Again being very flirty. I was curious and had a look at his facebook. He has a girlfriend (and they've been together for over 2 years) . I feel so bad for her. He told me quite a few inappropriate things. I did told him I didnt want to know anything. And he has stopped talking to me. Should I still send his girlfriend a message? Am I being stupid ?
<bot>: guy i met on reddit wants to send me wiener photos but I found out he has a girlfriend, should I tell her?