So my ex keeps ingnoring me but?

She said i was annoying because i text to much & that her bf hates me texting her, she never rarely replies anyway i think for that reason. Well last night i text her & she got really piss*d & said your ruining my relationship, I'm with my bf okk. Leave! Please stop texting me!!! the next day she changed her #.. But about a week ago she told me her bf was making her change her num, but that she was give it to me still? Well its only been 2 days & she just hit me up msn how do i reply should i? i have been so nice to her & she's been the mean one