No, she's not his gf because in his state of mind, she's nothing more than a fxxk buddy. Keep in mind, that he's still thinking like a young adult and he doesn't see their relationship for anything more than a friendship, not the true deep love that comes from a mature, committed relationship. So, what he's telling you is true in his mind.
The getting along and then having a day of arguing is typical and you aren't dealing w/an emotionally mature adult right now. He's going to get mad at things, and most likely silly things, and then stomp off and say he hates you, doesn't like you, i.e., like a kid.
Maybe he's being nice because he knows that the court date isn't far off. Maybe he senses that you are detaching and distancing yourself from him. Keep in mind, the more he senses you are distancing yourself from him, the more he's going to pursue you one way or the other.
I'm sorry things have been all over the place for you, but hopefully things will settle down after the court date. Keep the focus on you and your children and allow the man upstairs to work on your h.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
