Help me on this one: I think my exfriend is weird?

We started off as good friends as time past she kinda annoyed me n she never realized it, one time iwas getting these dangerous girls too hurt her n she knew I planned it but ijust told them to cuss ha out , week later.she my ex ask if I wnted to party n wen we saw eacj other she didny say a word about the argument like it never existed weird?? Time.pSt I mADE A FAKE FB Pg n said reLly bD things to her she knew it wasme so I cussed her out she did the same n she said bye curse word.. Today I got a msg sayn save my new num. I KNOW IT HER y wud she wanna tLk to me after wat we said to her;?? I didnt txt back she so weird how can u act like this never happen wat if I saw her n person again