Some people can't get over the idea that someone else wants you, she doesn't have to be really interested in you, she just feels like she has comptition, and that you are her property, and how dare you like someone else, so in her mind she's thinking "I bet I can get him back, I know he still has a thing for me, . Then when you don't respond like she thinks you should, she tries even harder to prove she is better then the girl you like. So when that doesn't work she gets mad, and talks crap about your new nice girlfriend that probably doesn't deserve to be talked about.
In most situations when the new GF is prettier, the ex GF tends to be really jealous.Its a female thing. I just had a recent breakup, and I could care less about his new girlfriend. I'll admit, if she was prettier than me (in which shes not), I might be just a little jealous, but would never talk down about her. Your EX, is very immature and a serious hater! And if shes this upset, she still has some type of feelings for you.
So fast you can leave and have one thats the art she wants to know
Yes! I know why! Because ex's are bitcges. Fugly ******* who are greedy as fucuuck and are too stupid to move on n leave ppl alone. I hate fugly exs fucck them.