What the hell are you blabing about ? she was dating FLASH ! "the Flash
Thompson" at the time, she was popular.
The reason she got interested in peter, was becouse when peter dumped her at the tutoring, something she never expected as she was popular and desired,but also showed that he was open to help her, she realised she needed, or wanted someone who cared about her,not becouse she was popular.
Your interpretation of this show Liz is completely wrong, and sure she rubed on gwens face whenever peter and gwen were toguether, what girlfriend wouldnt do the same thing when she sees a girl who is interested in your man giving him a warm talk ? She was protective of her love, teenagers do this a lot,in different ways.
The reason she blow off to break with peter instead, was not to break her face now that the in crowd were all dating, and she who choose the "looser" was being dumped by him.But the show is carefull enough to show her alone crying, wich means she wasnt being a sally avril, she was just using a mask.
I'm not disputing any of this, as I said that she genuinely grew to love Peter, starting from after he attempted to tutor her and she began to see that he was different from guys like Flash and that attracted her. Not to mention that when the two of them were together at Coney Island, she had a good time with Peter, and, of course, she was hurt when she saw Flash with MJ. And even after breaking up with Flash, she was still popular. I get all of that.
However, it was very, very clear that she knew Peter and Gwen had feelings for each other. Everybody at the school--even Flash--knew that Gwen was attracted to Peter. And yet Liz moved in and took advantage of the fact that Peter and Gwen were too shy to admit their real feelings for one another, especially Peter since Gwen, on MJ's advice, at least took the initiative and kissed him first.
Was that wrong of Liz to do this? Of course not. Peter was fair game since he wasn't dating anyone. But Liz, on some level, knew darn well she was playing with fire. As you said, she rubbed it in Gwen's face that she and Peter were together. On Valentine's Day, she was just as upset that she was alone on the "most romantic night of the year" as much as Peter having to ditch her at the resturant. Likewise, when she accused MJ of trying to split her and Peter up so that he could be with Gwen, shows just how jealous and insecure the foundation of her relationship with Peter is. She even tells Peter in this episode that if had been Gwen in the play, he would have made it, basically laying a guilt trip on him. Those are all signs of how immature she is when it comes to matters of the heart and that she was more concerned about
her own feelings rather than Peter's.
The fact that she felt she had to save face in front of the in-crowd by pretending she broke up with Peter rather than acknoeledging Peter broke up with her is a sign that she's still a bit self-centered. Obviously, she's no Sally Arvil and Peter
was definitely guilty of leading her on all this time;
both her brother Mark and Aunt May were right about that. But Liz is clearly someone who has not learned that relationships are not always centered around you. Granted, she's an adolescent who still has some growing up to do, and I imagine that Peter breaking up with her will be a step in realizing that, sometimes, love is more than just your feelings--it's about others as well.