How to tell if shes still onto you?

I want to know if women will avoid you to see if you have changed, lately I'd be really nice to my ex then she would just not talk to me and I'd get man and start an argument, but I realize its my fault she left, she wasn't going to leave for good, she just wanted out the house and I got an attitude cause she kept leaving me with our daughter by myself, but cause I got attitude She didn't come back and its been a month, if I just play it cool do u think she will come back? The past few days I've been nothin but sweet to her even when she blows me off, u think its over or is she just testing me?