Thanks everyone. Nothing was set in stone but it had been talked about since last New Year's. She had her daughter and was invited to the same New Year's party I was. I had planned on going to the party, then going close to downtown to watch fireworks with my brother, his wife and my niece + have some other friends meet us there. My brother watched her child while we went to this party for a couple of hours, then went to his house and everyone went to the fireworks together.
Since then, all I've heard is how this year, her ex would have her daughter. When I asked about NYE in the beginning of December, she confirmed ex would still have her daughter and when she got back from Christmas vacation (she was leaving for a week to visit her parents out of state), she'd let me know what she wanted to do. I saw her the weekend before NYE when she got back and after class asked again and she said we'd wing it and figure it out on NYE whether she wanted to meet up with friends and go downtown or what. So, maybe I assumed incorrectly that we were going to have plans. But when I asked the prior weekend, she could of told me she was going to another party and left it at that.
Unfortunately, I have to see her 3x a week at class, so last night I went the distant yet quiet route and left immediately as class ended, claiming my sinuses were acting up. I didn't want to say anything and cause a bunch of drama since I have to keep seeing her, but yes, the friendship is going to get decidedly cooler going forth. And no, I've listened the past few times things have gone south. When, not if, it happens again, she'll have to find someone else to listen to it because frankly, I'm done with it and I'm done with her.