I need strength in the following situation.

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On saturday I had a first date with this 24yr old woman (I'm 30).
We had great conversation. We split the bill and she says "add me to instagram" and "lets stay in touch".

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An hour later after the date, she follows me back on Instagram and throws me a "like".

Three hours later, I send a message to her: "hey, great conversation today!. These are the two movies I recommended you earlier: (...)" (we talked a lot about films in our date and she wanted me to remind her of these recommendations).
I truly thought I was in a NAWALT situation with this one.

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She didn't reply on sunday and neither on monday.

Later on monday (8pm) I asked her: "...no?"

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She replies within an hour or two: "yess. great."

I asked her if she'd like to go out again and she didn't reply.

Today, tuesday 7pm (23 hrs later) I concluded to myself that I needed to stop with this stupid online dating so I deleted her from WhatsApp and unfollowed her on Instagram. I also deleted my Bumble account.

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I went to the cinema with a bro and I receive at 9pm a "heyy" message from her.
Sidenote: I only show my WhatsApp profile picture to my contacts, so maybe she knows I deleted her.

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I really liked her but I'm tired of women's dynamics. They are just unpredictable and it messes with my emotions.
I know the best is not to reply ever again and just move on and continue going my own way. I'm tired of thinking I've found a NAWALT and then its just like any other girl out there.
I would appreciate advice from you guys.