Tldr:
-Girl, asked me to be her partner for competition
-She Seemed pretty cool, she asked me to the park
-I started talking about 420 to a friend there, since she was really against it and didn't know we all toked she got fed up
-She apologized at the end of the night

How should I act the next day?

Recently at my HS we are having a pingpong competition,
some girl I knew from earlier this year asked me if I could be her partner,
I accepted thinking I would have a fun time because she seemed pretty cool.
She got really into the whole competition,
bought me a paddel and would approach me periodically during the day and ask if
I could practice with her in the gym. Upon practicing with her more and more,
we had a great bond, we would get really hyped up and laugh and hug and joke around
and victories would be awesome! So then she called me twice
and asked if I would hang out with her
and go to the park with her and this other kid (a good friend of mine) and so I also brought a friend.
When I got there I started talking about 420, and apperently she started getting really fed up
since she thought we all stopped smoking. Partially because my bitch of a friend told her that he doesn't smoke
(because he liked her and had to agree with everything she said....lol?)
and I didn't know he said that for whatever reason, so I would talk about how he always asked me to hit him up and shit.
She started having a bad time, but that didn't ruin my fun I was still having a great time, while practicing
"game" the whole time and lots of kino.
I later left and when she dropped me off she apologized and I told her not to hit me up if she is just
going to be in a bad mood.
I then just hit up these other girls and just hung out with them that night

My question is: For the next day I see her at school,
should I just talk to her with less enthusiasm as if I lost interest
and flirt with other girls on different teams
or should I act the same as I usually do and as if she wasn't being a bitch that night while still
adding value to the group and trying to push that we would both enjoy our practice time (as we are still
signed up for the competition and have multiple classes together).
[I feel like this girl has a lot of potential just is very close minded about smoking, I want to give her
one more chance]

Excessive thinking about a problem, while losing focus on the big picture. The result is an overly complicated analysis, and any solution coming out of this will also be complicated. And probably a fruitless waste of time.

Just hang with her, flirt, and make your move Stud.

_________________
They call me the cat whisperer, cause I know exactly what the pussy needs.

I agree with this, OP is still young and in HS too. if the relationship is good and she apologized already. it doesnt matter, keep moving the stages. if she does anything again because of 420 and you dont like it. move onto next girl.