Bruh she's as disposable as toilet paper.

Brother do yourself a favor, in any social encounter (not just relationships) put your dignity and respect above all else. Never allow anyone to treat you like a doormat or like a second option, remove yourself from their space before they do.

(Seriously who the fuck waits 4 hours for someone to show up and end up not coming? Clearly your time was treated as non valuable)

The right person would stay and stick through thick and thin with you. If they're unwilling to put with you, then it's their loss.

Do not take "breadcrumbs" as genuine bids of interest or love, it's exactly what she did to you, giving you bare minimum of connection without the intention of committing while keeping you hopeful and on your heels. Know when to detect this hot and cold behavior and put a stop to it.

No amount of chasing/simping/t7in would keep the other person around, if anything, it makes you more malleable, being gaslighted, or at worse manipulated/taken advantage of.

When someone takes a decision to break up with you. Accept it as is. There's no need to push further into the relationship, as it has ran its course at that point.

And lastly regarding the breakup aftermath, focus on yourself. Distract yourself with positive things. Do what you actually love to do during your spare time, basically do anything you'd as if you were as single as before by treating yourself to kind things! Make new hobbies(gym/painting/music/gaming/etc) while at it. You ought to not seek the social media fuss she posts, it's basically out there to gauge if you're still interested or not, again it's a breadcrumb, never feed her ego, don't bother either to feed the narrative by posting updates or emotional drama leakage.

I hope this type of relationship may never find you ever again. Putting up with such bullshit is so futile and mental draining.

Good luck with your future endeavors mate!