So I'll try and give as much relevant details as I can.

Start off with the fact I was out on a day2 with this girl, call her HBNurse, we went out for coffee but then I decided to change it to bubble tea and a walk. We talked, laughed, it was fun, there was some kino, happy days.

Fast forward a few days, and I suggested we'd go for the local chinese night market, it's a fun time. However she said she can't go that weekend, but we should go next weekend (which was this weekend, weekend of June 14-16). This weekend rolls around, I call on thursday and say

Me: "hey, let's go on friday"
Her: "Oh I can't friday, already made plans, but I can go saturday"
Me: "I can't saturday, I already made plans for that"
Her: "Oh, well maybe I could do Sunday, I'll find out and let you know"
Me: "Ok, let me know friday or saturday"

Friday and saturday roll by, no phone, no txt, no nothing. Sunday rolls by and I go out to a festival with my buddy, at about 7:25pm I get a text from her:
"Hey hows it going?? Completely forgot its fathers day today "

My plan for response is to wait until Monday after work, and text her:
"Oh, I was just out with my friend at an awesome festival and then hung out, doing pretty well and you?" to convey that with or without her I still have fun. But I'm wondering if I ignore this if this disrespect for her word will become a habit. I'd like to just easily NEXT her, but the catch is that I'm interested in getting into a relationship with a Jewish girl (she's Jewish, so am I) that's more secular, which is what she is, and there aren't that many of us Hebrews running around so she won't be that easy to replace.

Any advice is appreciated

_________________
No matter how dark the night, the sun always rises
No matter how hard the ground, eventually a flower blooms
No matter how thick the clouds, beyond them the stars shine
No matter how unappetizing the food, eventually it becomes flesh and blood

you could always just tell her what to do then stop calling her until she does it

example:

''ok, just text me to go out next week and we will see if we can do something together, I'll try to not make too many plans''

then just shrug your shoulders up and get onto meeting some other girls, if she calls, make it happen, if not, oh well was a fun date and experience

I wouldn't say they are mind games (I've been mind gamed recently, as my latest posts prove... )
Only suggestion, don't exaggerate in trying to tell how amazing your Sunday evening was or you may give her the following message: "hey, i'm trying hard to make it seem my life is super happy without you".
just explain what you did without too much emphasis.

this said, I'm not an expert, so take this with caution.