I need some help on an ex!!!!!!!!?

i need some help on an ex of mine will here is the story my exes lil cuzin she has been talking to on facebook for like one month and i was like watever the girl is in middel school i was going to be nice will here is were i need help out of nowere today she was like when are you going to come and hang out with me and i wanna know why she keeps asking me this why would i want to hang out with her when shes family with my ex and half of them dont like me cuz of what happen last year thats why me and my ex dont talk exes are exes will i was like why cant you hang out with my exes new girl if he has one and then she calls me a ***** and a werido and says she dont like me anymore and then she just blocked me like okay wif is she doing i think hes over their house or something she was just being a lil ***** but im glad she blocked me i dont have to deal with that but does anybody know why she keeps askin me to hangout and all this stuff and then acts all pissed off and bad i dont get it???