Its almost too late,i need your advice?

[aladin hussien]

Okay,soo there is this guy that claims my ex is his girlfriend and he is even using her picture as his avi on twitter,he is always talking about her and stuffs like that,but the interesting thing is that she is not using his picture,she talks to him on twitter the way she will talk with other guys,she just retweets anything he say about the relationship,,then my ex and i still talk very well,she allows me call her pet names and she likes it,we still talk about our most intimate moments together,we flirt with each other and basically still act like we are going out,we talk for long on the phone and even when we fight and stop talking for a while but come back together everytime..hell she even still sends me her pictures and she has never mentioned it to me that she has a boyfriend..
I don't know what going on between her and that dude but it seems like they are serious and it still feels like we have this intimate bond between us..does she like this guy or whats going on..help?