Does this seem like a "real" relationship? And is it dangerous to get involved? Really long question.?

I had a similar experience with one of my friends she had a bf and was jealous of mine and also her relationship seemed to be about because they had it very soon after dating. She was going on to me how great it was and telling me intimate details that I didn’t want to know about. It sounds like if you say something to your friend she wont listen. If that is the case don’t say anymore and let her do her own thing. Her bf will soon leave her when he’s got enough of fun with her.