Hi everyone! I've been lurking this subreddit for a while now, but I felt inspired to post when I realized I had a personal experience that really fits with the philosophy of FDS.

Over 6 months ago I met a guy through social media who seemed awesome; he had an interesting job in the entertainment industry, and he was a great conversationalist and never even mentioned sex or displayed any red flags. Context: I am a 19F and he is a 31M. (I realize now that this age gap is a very bad sign.) His social media also didn't show any red flags, he had a couple of pictures with him and 2 different women, but the pics were all over a year and a half old and didn't have romantic captions, so I assumed they were either EX girlfriends or female friends.

He travels a lot for his work so he asked to meet me and take me out to dinner when he's in my area again, which I said yes to. He also called me a few times, in the beginning the calls were very short and respectful, but at one point he called me on a night when we had both been drinking and the conversation turned a bit sexual, lol. Anyway, the last time we spoke over the phone, he confessed that he HAD A GIRLFRIEND. Turns out one of the women in his old social media posts is his longterm girlfriend of 3+ years who LIVES WITH HIM. According to him, she's in her late 20's, has a great career, and is super in love with him. I was disgusted and asked him why he is wasting her time if he isn't serious about her, and he told me that he doesn't think she's the one, but... "If I'm single, I'll just be all alone in this big house." Lmao.

So I obviously want to tell this poor woman that her boyfriend is soliciting random teenagers on the internet, but I'm kind of scared because I've never met either of these people and it feels kind of presumptuous. I know it's the right thing to do, but the idea of messaging her scares me. Should I just block him and forget about it? Does anyone have any comments/advice?