<human>: Can you provide a brief rundown of the text in within 3 sentences?

When my boyfriend and I had been dating for six months, I found out through a mutual friend that a girl (Stacy) he had introduced to me as his "best friend" had friendzoned him a few years earlier. I was pretty upset, because we saw this girl frequently and he always seemed to pay special attention to her, but I figured it was just because they were good friends. Finding out he had had feelings for her really put me off hanging out with her, because all I saw when the three of us were together was him treating her like his girlfriend (how much of that was imagined in my head I'll never know, because he denied it rather rationally) and I couldn't stand it. Also, the fact that he kept it from me was really painful to accept. Over the next 1.5 years, he has basically stopped hanging out with her (of his own accord) and I can't remember the last time they hung out or even spoke.

Today, I was looking through his fb page because he filled out a lot of that "what movies have you seen" crap they have now and see that he has a groups section. One of his groups, of which he is the only member is "I've seen Stacy naked in my dreams" and I guess it was supposed to be for people who had seen her naked in dreams, but it's just him posting whenever it happened and a few other posts from people saying how weird the group is. I didn't read any of them, I was so disgusted that my heart was racing and I thought I was going to cry. 

I know I should get over this and not let it bother me because it's in the past, but the whole thing is so skeevy I can't let it go. Who does that to some poor girl? My boyfriend is not a creepy person at all, and I'm terrified of talking to him about it. Am I in the wrong? I just feel like he was sooooo obsessed with her and he doesn't have half the emotional attachment to me to even tag me in a status, let alone create an entire fb group about me. Which I wouldn't even want this because it's so violating.
<bot>: Found an old fb group my boyfriend made about a girl he used to have feelings for but it's a sleezy one and it makes me feel bad about myself and my boyfriend.