Most Helpful Guy
Yo, you need to slow your roll. Getting dumped "often" in a 2 month period is a sign you need to steer clear of the dating game for awhile. the guys that you're describing aren't mature enough to date, and right now, neither are you.
Most Helpful Girl
Guys at that age tend to be a bit foolish. I tell you something: I am 38 and recently I went through old letters and whatnot to throw some stuff out. That is when I came across some old letters from guys when I was around your age. At that time, things these boys did to me really got to me, but now, over 20 years later, I read those letters and realise what idiots they were. So no, there is definitely nothing wrong with you. It happens to most girls out there. If I can give you some advice though then I think you should date less boys and just enjoy your life. Being the new girl at school I can imagine all the boys wanting to be around you since you're kind of the flavour of the month (I don't mean this in an offensive way). As for Jack, just ignore him. He is an idiot and the things he tells others might be things he says without actually meaning them. You know he wants to perceived as tough guy, just like most 16-year-olds.