<human>: Can you give me the gist of the text in a nutshell?

Advice*** sorry.

So, last night, one of of my good friends who I never get to see anymore texted me and asked if I'd like to hang out with his youth group and watch the heat game. Obviously I accepted. I should add here that neither of us have friends outside of each other so we spend 99% of our time together. My girlfriend and I live together, and I let her know where I was going before i left. The game ended sometime around 12, I left my friends house by 11:30 and was home by 12. On the way home i gave her a call to which she said "Is there anything wrong? No? Then i'm going to bed." So i get home and she's not talking to me. I tell her that grown ups use their words when they're upset and how she's acting is unacceptable and i wont tolerate it. Blah blah she felt left out blah blah. We talk, i maintain frame and definitely don't apologize and we end up kissing and going to bed. Fast-forward to today. She gets off of work at 6 and is usually home by 6:30. at 8:30 She calls me 20 minutes after i call her asking me to read her schedule to herand find out what time she works in the morning; implying she'll be out LATE. Mind you, she hates her coworkers, and we're both netflix bums who never go anywhere special (without eachoter)Shes obviously just playing annoying petty, relationship mind-games but i'm wondering what the most alpha response is. Should i let her come home to see me playing halo as if i had a blast and didn't notice her absence (unwavering oak tree alpha) or go nuclear and tell here i cant date someone who is mentally immature enough to play stupid ass mind games? I know, living with an ex is hard, and i do love her, but i'm worried that if i accept this behavior it will just betatize me in her eyes and doom our relationship anyway. Sorry for the long read.
<bot>: I stayed out late last night with friends now she's staying out late with her coworkers (who she hates). How do i respond?